The only thing that really ticks me off is poor connections. When I'm in one of those lobbies, it seems like none of my bullets will hit the target. I can fire an entire magazine of an ACR, MP7 (etc) and get 5 hitmarkers, only to be killed instantly by the guy who I was shooting for a good 4-5 seconds. I find that to be most annoying because you don't stand a chance. That is also why I'm more inclined to play BF3, becuase I don't have the same issue on dedicated servers.