It's simple:
I take a quick poll of who's on the server. Then, I travel around, and gnaw through all of their individual power cables on their computers. Generally, I can't get away with this when they're playing, so generally I set fire to some part of their house that's away from their computer. Once their power cables are all eliminated, I return to my abode, and cheerfully steal the flag or cap all the points.
I win. I am THE credit to team.
However, often, people reconnect, and after a long many nights of cable chewing, I have to actually play normally, and that always sucks. However, when I must, I generally do what the team needs first, and what I enjoy the most second. it also varies with maps. If the team needs an engie, or a medic, I'll do those, because I enjoy them both; generally, however, my first tendencies are to hit soldier, demo, or sniper.