PvP games aren't for me, but I love the chaos of BF games. I usually spawn in and just stand there with AA until I get sniped. The spawn points are horrid, so it usually doesn't take long.
When I get bored of that I'll wander around and view the scenery, waiting for some serendipitous, awesome * to happen. Running at tanks or large groups of enemies with a knife is always a good time. I only play as the support medic guy, so I can rez people - might as well do something productive. If I run into someone, I'll literally just keeping running into them until they kill me. If they are being completely blind to their surroundings or generally very bad, I'll put them out of their misery.
I probably have more games played than kills.