I don't own an xbox 360 myself (probably never will) but I have spent time at a friends over the weekend who got one.
NFS:MW - what can I say, its just underground 2 with less customization options (like how you have to buy the full body kit and cant mix and match) and cops. The graphics are really sub-par, I have the PC version and I think it looks better than the 360 one. The game still sucks overall though even on my computer. Every game EA releases takes me one step closer to not even playing any of their games.
Call of Duty 2 - The game looks nice, but I still think the PC version looked better. I'm also so sick of WWII games, at least FPS. Why do we need like 10 different Medal of Honors and 5 different Call of Duty's.................they are all like the same flippin game.
Perfect Dark Zero - Perfect Dark on the N64 was a much better game. This game feels like nothing more than a tech demo for the 360, graphics can only take a game so far

I just love how I can't get over that one foot rock, even current gen gameplay is more advanced than this.
FIFA 06 RTWC - Well, its still FIFA filled with shitty FIFA gameplay. The graphics really dont look that good from the normal viewing distance. Fuck EA, fuck FIFA, and long live PES/WE.
Madden 06 - I hate madden, but it does look nice...........maybe.