Battlefield is top, got 3 and 4 on PC. Stopped buying Call of Duty about 4 editions ago when they all came the same, Battlefields actually pretty realistic the maps are fucking huge. Like you can actually sit in some hilltop with your sniper and pick people off, like a proper sniper rather than running around some tiny map jumping around corners sniping people from close range etc.
Having a fully destructible world is fun too, every buildings walls can be ruined etc brought down by explosions makes it a lot more fun!
64 Players maps online aswell..