What game should I get for my new gaming PC

I just got a new gaming PC that can run anything (you may not belive me becasue only guy already called me a liar but it ran the crysis demo on hight at 1690x1050 on high smoothly).

The only good simi-modern game I have is civilization 4 (which I love and will most likely get the other couple expantion packs for)

I need a new game for it, what should I get?

Ummm what kinda games do you want? FPS? RPG?

I reccomand The Witcher: EE. Great game.