FnD, Siege, Duel.
FnD requires people to attack a target from the beginning, so the battle is going to happen right away.
Siege, because is the same as FnD, except more mayhem thanks to respawn.
Duel, because I am a duelitist.
I like tdm, battle and the other objective based as well, just not so much.
If siege bots are more intelligent, this would be my favorite gamemode. Commanding bots in a siege.