I've gone through the songs the day after the first semi-final without knowing the results, so some of my preferred songs may already be out-of-competition.
Most appealing overall entry - Alexander Rybak - Fairytale (Norway)
Strongest overall entry - Waldo's People - Lose Control (Finland)
Most amusing - Copycat - Copycat (Belgium)
Best anthem - Chiara - What If We (Cyrpus)
Niftiest singing - Malena Ernman - La Voix (Sweden)
Most intriguing - Anastasia Prikhodko - Mamo (Russia)
Most memorable - Jade Ewen - It's My Time (UK; based on having remembered it for months now)
All the entries are listed here.
Kejsi Tola - Carry Me In Your Dreams
A pop-disco lite piece which might prove memorable, even if it does sound generic on first hearing. The singer, for all her cute coat and the pretty scenery through which she wandered, never seemed like she really meant the lyrics.
Susanne Georgi - Get A Life / La Teva Decisió
Upbeat catchy girlband song, apparenly sung by one lone redhead in a comfy fashion-parade of outfits. Charming.
Inga & Anush - Jan Jan
An exercise video with a rash of symbolism: suns, moons, body painting, my favorite, dancing cave art. Some nice outfits, possibly traditional to Armenia, or possibly just meant to look traditionally something.
AySel & Arash - Always
Finally - singers having fun! A pop-folk number with belly-dancing movies, black outfits, and fire breathers. I don't think it'll be that memorable - but I liked it for the singers' enjoyment.
Petr Elfimov - Eyes That Never Lie
Rock with a white leisure-suited singer and lots of flashy neon. He's a strong singer, but I just can't take him seriously in that outfit.
Copycat - Copycat
Fun and funny country-rock piece on Elvis imitators - from Elvis' perspective. Ridiculous, charming, with an excellent plot twist.
Bosnia & Herzegovina
Regina - Bistra Voda
Post-war misery with an anthemic tune sung on the scale of a small military marching band with lots of invisible backing string players. Lots of ballet dancers marching with red flags.
Krassimir Avramov - Illusion
It's a pop-disco soundtrack to a really bad medieval movie with dying knights, flashbacks, lots of horses, court dwarves, symbolic blackbirds on swords, and swirling cloaks. "Gimme, gimme your time. Show me, show me your love."
Igor Cukrov feat. Andrea - Lijepa Tena
Swirling black smoke and a salsa beat. Yearningly and earnestly sung by a lone man and a posse of drapeily-clad women. Solid performance of strong-voiced wist. It might be more meaningful to me if I understood the lyrics.
Christina Metaxa - Firefly
I really want to like this song: it's a low-key inspirational pop song with a medievalesque setting with an old fort and woodland about taking risks. It just didn't quite come together for me.
Gipsy.cz - Aven Romale
This novelty entry is about a red-leisure-suited superhero-eque guy called "Gypsy". You too can feel like him, I hear. There're violins, and there's rap. And other stuff.
Brinck - Believe Again
Straightforward, inspiring boyband song - which is what you'd expect, given it was written by well-known boyband artists. Filmed in a limited palette scheme, this year's popular black and white. Gently inspiring, singable, but nothing outstanding for its genre.
Urban Symphony - Rändajad
Hypnotic symphonic rock with New Age elements sung by women dressed in black against a starry background. The most striking entry yet.
Waldo's People - Lose Control
Dance-rap, a powerful piece about loss of control in life, set around a homeless man, lying on the street while trucks drive by. Fire and darkness.
Patricia Kaas - Et S'Il Fallait Le Faire
A quiet, sharp, dark, reflective lounge-pop song, largely dressed in black and white. It could go nicely in a sad musical.
Next Time - Neshto Shto Ke Ostan
Rock song with fidgety photography, Bon Jovi hair, vignettes atop tall buildings, and a thunderstorm. I think I'm forgetting it already.
Alex Swings, Oscar Sings! - Miss Kiss Kiss Bang
Fun catchy swing song which I at first hoped was a love song to a car by a nearly topless young man: until the car was abandoned in favor of a Eurovision-pandering continent tour. Oh well. The song was still fun.
Sakis Rouvas - This Is Our Night
This should have been a song about cosmic battles, what with the main characters arriving in flashes of life. The screaming fans really brought down the tone. Driving dance beat with odd touristic intervals, a woman rising out of red waters - the video's confused, but the song's not bad.
Zoli Ádok - Dance With Me
Hey, it's science fiction! Futuristic city, floating people doing bizarre dance moves to disco music. Now we're into the WWII sailors and movie star women, and it's working better. 1930s mobsters? '70s disco? Very confused video, adequate song.
Yohanna - Is It True
A minor, elegant, singable ballad about betrayal in relationship, backed by strings, and sung by a women in white.
Sinéad Mulvey & Black Daisy - Et Cetera
Rock-pop women in pink and black about jealousy with a strong sense of humor. Nice running visual joke about the difficulty of spelling the song's title. Very appealing.
Noa & Mira Awad - There Must Be Another Way
Elegant, earnest tuneful duet by a Palestinian woman and a Jewish woman. A solid entry.
Intars Busulis - Probka
High-energy, random chanty song with abstract dancing sung (expectedly, I read), in Russian. I'm feeling a little bored and it's done not yet.
Sasha Son - Love
Pop-ballad against child violence. Somewhat preachy. Singer has a good hat. Not a bad tune the more I hear it, but I don't think it's distinctive enough to do well in this competition.
Chiara - What If We
Hopeful, inspirational, grand pop ballad by a powerful singer. Lyrics are cliché, but I don't care: I really rather like this.
Nelly Ciobanu - Hora Din Moldova
It's a "yay, Moldova" song! Its pretty streams, its green lands, its cities, its cheerful traditional outfits and lively dancing, with enthusiastic group chants along the way in a pop-traditional song. Not bad; I bet I'd like it even more if Moldova were a country I related to.
Andrea Demirovic - Just Get Out Of My Life
A driving pop-rock song starring skimpily dressed singers lounging around on cars and chained up in handcuffs. Could work well as a dance floor staple, but I suspect it won't have that much longevity.
The Toppers - Shine
This pop song with an SFnal setting feels like it time-traveled in from the '80s. Very cliché and feels rather paternalistic in its good advice from the trio of male singers. "All we have to do is love the one we hate." Gratuitous use of Obama family television shot.
Alexander Rybak - Fairytale
Plot! Gymnastics! Cute young male singer who fiddles! So much which has been missing from most of the previous entries! "I'm in love with a fairytale, even though it hurts." Lively pop-traditional. I hope it does well!
Lidia Kopania - I Don't Wanna Leave
Black and white relationship tristesse with a solid singer. A woman sticking it out in a broken relationship. Impassioned middle-of-the-road ballad.
Flor-de-lis - Todas As Ruas Do Amor
A terrible recording of an upbeat folk-pop song by a woman with cute red hairpieces. The melody has potential for memorability.
Elena - The Balkan Girls
Balkan Girls like to party in unfortunate outfits in this lightweight dance number. It's an advertisement for the Balkan party scene, and reminds me of various other songs which have recently been on the radio, but which aren't coming to mind offhand for me to list them.
Anastasia Prikhodko - Mamo
The host country entry. A fresh-faced woman sings with deeper wisdom and voice. Catchy song of the sort which sounds as if it has plot and more going on to it than meets surface appearance. It being in Russian, however, I don't actually know. Ends in lightning. I think it well deserves the top-10 place which the host country's entry inevitably earns.
Marko Kon & Milaan - Cipela
Black, white, grey, accordian, tipping for service, money-grubbing ballet singer, lead singer with wig. Decent rhythm, but not really sure what to make of the overall result. It doesn't do much for me.
Kamil Mikulcik and Nela Pociskova - Let' Tmou
Operatic pop, lounging around on a white piano. Nice device of a digital picture frame containing the singers. Very earnest.
Quartissimo feat. Martina - Love Symphony
Oooh. Operatic rock with shadow screens in gold picture frames and string players. The tune itself is uninteresting, but I really like the lush soundscape/soundtrack of the string and drum players. Better as movie background than Eurovision foreground.
Soraya - La Noche Es Para MÍ
Cliché dancing tune with driving beat. Lots of a jewel-covered naked woman anda woman clothed in white with men in black. Has enough distinctive character to the traditional underlying tune that it could do pretty well.
Malena Ernman - La Voix
Sarah Brightman does dance. Opera singing star Ernman is impressively versatile in her ranges - refreshing in this contest. She also clearly has a sense of humor - she has an amused secret in her eyes. Song is an accessible ballad with ensemble support. It's really growing on me.
Lovebugs - The Highest Heights
Alt-rock, laid back, long-haired, and informal. "Will you catch me when I fall?" I could see this becoming a radio staple, but less sure it's distinctive enough to do well at Eurovision.
Hadise - Düm Tek Tek
Pop-dance with bellydancing, jeans, and women in skimpy white shirts. All about the hips and the sex appeal. Standard "we're in a perfect relationship" song.
Svetlana Loboda - Be My Valentine
Burlesque/circus setting with erotic use of food and ridiculous S&M setups (i.e. missed Valentine's arrows). Pop-dance silliness and high energy. Could only do well if the stage performance is as memorable as the video's visuals.
Jade Ewen - It's My Time
I watched the show which chose this song for Eurovision, and months later I could still sing is, so I know it's memorable. It's a powerful ballad with a positive message, backed by Andrew Lloyd Webber-power. I think it stands a decent top-10 chance which would, at least, be a refreshing break for the UK which so regularly places last. Note: She's dressed in white.
Edited to add: Humor rarely is a winning formula for Eurovision. "Copycat" is already out of competition. My other first semi votes ("La Voix", "Lose Control", "What if we") have gone through to the finals.