Games I've been playing a lot lately:

Playing this over Xbox Live beats the pants of off the dial-up days, the entire game is entact and unchanged, a trip down memory lane (and 200 easy achievement points)

Right now, it's the best run-and-gun game on the 360

Grand Theft What? This game is all the car combat you'll ever need. It's half GTA, half Twisted Metal, and 100% awesome. Also, check out the sequel- Interstate '82

A fun shooter for the 360, not as fast as I would like, but it's a very good looking game with very solid combat.

I preordered this game before it came out, and never picked it up because of the mediocre reviews. Now I've given it a chance and I am pleasently suprised at how good it is.