Uncharted 2 - 3
Not really much to say here. Great story, improved gameplay, great graphics and controls. Heck, they even added in multiplayer (if that kinda thing floats your boat, I played a single match and that was enough for me).
Shadow Complex - 2
My Xbox 360 GOTY. Not flawless, and the story could have used a little bit more work, but damn if the game wasn't a blast to play. I'm hoping a sequel comes out in 2010 with a longer single player game and some more VR missions (maybe even a VR stage creation tool...)
Dragon Age: Origin - 2
Still haven't even finished playing the game yet, but once I do I know I'll be starting another playthrough as a different class. I would have preferred if the core game was a little more fleshed out like NWN2, but I can understand that the system was made simpler to broaden the audience. Game looks great on my PC too.
Skate 2 - 1
Graphics and frame rate were improved over the first entry, but I didn't feel the single player story was as good. Online play was decent, but loaded with bugs. Still a fun game though.
Katamari Forever - 1
Having not had played a Katamari game since the first one, this game was a pleasant surprise. Some of the missions seemed to be direct copies from the first game, but there were plenty of new ones (well, new to me) as well. The game also had a nice challenge in trying to get certain things rolled up (Cowbear, large item in the Hot/Cold stage). The graphical filters and remixed soundtrack, as well as the Katamari Drive mode made replaying levels not a chore, though I doubt I'll ever play another Katamari game again.
Battlefield 1943 - 1
Was a fun game, even though I didn't enjoy it as much as I would have if I were able to play it with a KB/M setup. Reminded me of all the fun time I had playing BF1942, and reignited my interest in the series that I had lost after the horrible game know as BF:Vietnam

Can't wait to see how BC2 turns out now.