I'm playing
Brothers in Arms: Hell's Highway (Xbox 360)

This gritty, squad-based WWII shooter is still well made and gory as all get out, but it really doesn't stray from the formula of other games in the series ...

I Love
Grand Theft Auto IV (Xbox 360)
The highly-anticipated sequel to the carjack-fest of the century is sure to satisfy all your mob and hooker related fantasy. Okay, maybe not ALL your hooker fantasies.
Left 4 Dead (Xbox 360)

An incredibly tense multiplayer experience like no other. A must buy for shooter fans.

Fallout 3 (Xbox 360)
The freedom may scare people used to more linear shooters and the simplified customization might disappoint hardcore RPGers, but if ever a game was worth broadening your horizons for, this ...