I made the mistake of playing nothing but Suppression on Devil's Road with respawn for like two weeks straight, and now I know that map like the back of my hand. I can get up to 3:1 kills to deaths, but on any other map I have no clue where I'm going, so I'm lucky if I end a game with 5 kills
Harvestor, Big or Small and any mode, favourite is control (coz i always get MVP)
Devils road (Small respawn nightime) or large convoy.
Antenora Breach nightime. Its so easy to hide in a ghillie and an IW80/STG77 suppressor 1 and front grip and kill the poeple running in and out of the raiders underground storage facility.
I dont really care what map i am playing because you gonna have to play them all one day so why not get good at them all but those are my favourite maps.