You know, it's not the first thing that comes to my mind, but I wanna say Jungle from BlOps1. Just because as I was sitting here just now thinking of my favorite moments, a lot of them ended up being from Jungle. This is despite the fact that I used to leave whenever it was picked, in the early BlOps days at least.
Eh, it's like 2 or 3 people who post a lot, making it look like more people hate the game than is actually true. -LordRattergun