I don't hae me an Xbox 360 yet, I'm quite jealous.
Anyway, I've been recently playing Call of Duty 4. It's a neat game, a little easy but it's pretty additive. The main thing I love about this game is that when you snipe, head shots are very accurate. Usually, I find other games are really bad with that sort of thing.
Lotta missions, although I find the game short (as most games are) but it's nice. I just wish there were more after you beat the game, yah know, more 'challenging' missions and all that jazz.
Next.