I've only played MW2, MW3, Blops2, and Ghosts. If I break it down to games, my 3 favorites in MW2 are Favela, Skidrow, and Rundown. MW3 would be Dome, Fallen, and Hardhat. Blops2 favorites are Standoff, Express, and Carrier. Ghosts favorites are Warhawk, Tremor, and Sovereign. Whew.. now it's tough to pick an all-time favorite. Buuuuut, I think I have to go with Dome.