I do mostly support. And subconciously rely on my teammates way too much. Like if im rushing to point A, with a teammate following behind, and an enemy flanks me, i automatically assume my teammate would shoot him down, and dont bother aiming for him. Unfortunately for me, im surrounded by idiots most of the time. So we both die. -.-
And i occasionally do the leading. When my teammates are mostly dead or are a bunch of idiots with brains the size of walnuts. Which is most of the time.
Maybe THAT's why i haven't played an MMO in forever.