@Blackandproud,
I forgot to add Call of Duty to the mix haha
Yeah, I think Oblivion is the second best game on the X360.
I mean many publications called it the game of the year last year. I like it especially because it isn't turn based, it's more of an adventure game with RPG elements. The combat is solid, and you have a plethora of different ways to play the game in terms of weapons and magic.
Be prepared to lose a lot of sleep over this one.
I've logged in like 100 hrs already and I still haven't finished it yet.
Don't be turned away by the length though, you can finish the game in about 50 hours if you follow the campaign and stay away from the side quests.