Well, battlefield is the most fun i have ever had in a PC game, maybe because i come first so often.........
Blowing up a bridge as your enemy drives over it, knife fights on the damn, stealing an enimies vehicle as they capture you flag, being the last one left and finally capturing the spawn point.
It's a whole experience, and its well balanced too, there are medics (like me) snipers, assualt, special forces, anti tank, all to make it feel so much like a real battle.
The strategies are really involving, but what you may find annoying on some maps is that the aircraft dominate (kubra damn) while on others they get slaughtered.
Flying is challenging but easy to pick up, i prefer to be a foot soldier.
One thing that this game is is satisfying, you can kill someone and feel like you have made a difference, the feeling that you beat and are better than several people never wears off.