Alan Wake. The mood, the story, the gameplay, all had me very impressed while watching the demo on stage. This may be a day one purchcase for me

All Points Bulletien (APB). While we didn't get a lot of substance, The trailer of the game reaffirmed that this will be a unique and hopefully awesome game.

Natal/Milo. I know that appearances are likely decieving in this case, but the idea was just too damned impressive to ignore. 

Beatles Rock Band. I wont be buying it (my rock band setup is on the wii, and im not shelling out for two pairs of instruments) but Harmonix is going the extra mile for this one. 

Call of Duty Modern Warfare 2. Another one i won't be buying, but the Snowmobile chase was extremely awesome

Edit: The Saboteur. The stylish look and plethora of options for going about your mission intrigue me. I'll have to get this one in my hands before making a final verdict

What games suprised me:
Splinter Cell Conviction. I haven't enjoyed any of the Splinter Cell games to date, but something about this one is grabbing me by the throat and saying "buy me". I just wish they'd not make the main character into a Jack Bauer rip-off, which it seems they have

Brutal Legend. Until today, i was not interested in the game at all, mostly due to my anti-Jack Black bias. However, the presence so far has me anxious

Rabbids Go Home. It looks like sort of a Katamari/Nuts and Bolts hybrid, which sounds good to me

Edit: Forgot Shadow Complex. That game looks EXTREMELY interesting.

Dante's Inferno. Maybe if I had been into the source material this would be different, but it looked pretty standard. 

Crackdown 2. Another cg trailer featuring another muscle-bound, folicle-lacking hero. Have we had enough of these yet?

Metal Gear Solid Rising. Im sure the game will be good and all, but i am completely indifferent to it. I wanted 4.

Tony Hawk Ride. An example of how Microsoft (and likely Sony) are trying to get a little bit of Nintendo's wii juice. Couldn't they have just done this on the Balance Board?

Final fantasy XIII. Maybe it was because I couldn't hear what the demo guy was saying, but i couldn't understand at all what was going on. Maybe if i watch this part of the Conference again i can put the game in a different section.

Red Steel 2. I was dissapointed that sword swings still seem to be predetermined like the first one, but the graphics and style are, for lack of a better word, sweet

Star Wars. The Old Republic. The Jedi fight was flipping awesome, dont get me wrong. But I wanted to see some gameplay footage. The idea that everything will be read aloud instead of text is pretty amazing, but is gameplay too much to ask?

Mass Effect 2. I will be buying this game, no question. But they showed us the exact same trailer as we saw a few days ago, with no new information

Halo ODST/Reach. I'm not about to spend another 60 dollars on another mediocre single-player halo experience, or for the priveledge of playing the new multiplayer maps.