Operation locker is a ton of fun. I played Obliteration on it last night. There are a lot of different things you can do.
If you're inside, you get to run up behind a crowd of teammates and peak your head around corners and shoot rocket launchers down a hall.
OR you can go outside, find your mass of teammates, and slowly peak your head around a corner and fire off a sniper shot. Just don't peak out too far or you'll be instantly shot by about 12 snipers from the other team.
There's this tug of war mechanic where your mass of teammates slowly pushes forward or backward, which moves the grenade launcher\sniper battle to completely new and interesting locations.
I don't know about you guys, but that's why I love Battlefield games!