I have to be honest: Normally, I'm not into these first person shooter games.  They're just so clunky, most of the time you can't tell where you're going, you don't know if an enemy is behind you, (Or at times even in front of you, if you get a weird camera angle) and plus might I add that you can't see your character, which does not really, (For me, most of the time) give that whole imaginative feel that you ARE that character.