Me, depends. When I'm on trips with Boy scouts, I play the reserve, taking on responsibility as it is needed to insure the groups survival. As per my Instructor post, I need to help younger kids advance through ranks, so I need to take charge or give guidance to the younger guys heading trips. Also, I am the unofficial patrol leader of my patrol. Every kid in it respects and follows me. Kinda un-nerving to be honest.
When it comes to school, I am the Database. I am the guy who knows everything, teaches others how to do things, and take charge when people are confused. Works out pretty well.
As for Sports, I don't play travel or rec, I just play for fun with friends. But I am overly aggressive. I will discreetly foul any one. I will charge you, and I will scare the hell out of defenders.