Ok, my official entry, which is short but sweet.
I deserve Left For Dead because i haven't owned a first person shooter since Doom 2 (1994). From what I've read, L4D is a cooperative FPS, and has a single player mode, so it'd be an awesome way to get back into the FPS world without having to worry about getting constantly fragged by some 8 year old kid who can grenade-jump like he was a member of the harlem globetrotters.