Been playing mostly Mass Effect 2 and AVP.
Mass Effect 2 is just... brilliant. Game is packed to the gills with content, great fun to play, good story, amazing graphics. Up there with Bayonetta for one of the best games i've played recently (I think I like Bayonetta better still).
AVP is a mixed bag. The Single player isn't bad, but it's not really anything special compared to other good single player 360 Shooters (Darkness, Halo ODST, COD Series etc), but it has it's moments. I nearly fell out of my chair during an Alien attack once, thankfully nobody else was home to laugh at me. The game really shines online though, really, really excellent. I love the team deathmatches especially, even mixed species is fun combining the various powers of hte teams. It's fun ot jump into Ranked Match quick play and just get a roullette of various game modes. I think I like playing as Marines the best, Aliens and Predators are around the same for me. I find it tough playing both as Aliens need to get in close and use their tail attacks to get anywhere, and Preds really depend on their weaponry to win matches. Either way, it's all a lot of fun.
EDIT: ALMOST FORGOT!
Thanks to the awesome GP2X Wiz, i've been playing some classics on the train trips to work/uni. Last night I was playing Moonwalker on Mega Drive, and holy crap what a fun game. It kept a smile on my face the whole time, listening to the music, watching the cool animations and just the whole bizarre yet fun nature of it. It also has to be one of the best presented games EVER. So many slick little touches, like the psuedo cut-scenes with MJ doing the dance moves with special effects, the 'Wooo' level announcement. Hell, look at the very first level of his silhouette walking into the club and throwing the coin into the juke-box.
I also have the PAL version where he fights zombies to 'Another part of me' instead of Thriller. It really works so damn well though.