I bounce back and forth between my dominant and submissive sides in the real world. When I'm at work or my favorite activity, I take charge because, it's what I do. I can command people and they listen because they know I know what I'm talking about. =) However, when around people or at a party, I find that I am more shy. I more than likely will not go up and start talking to someone I've never met.
In my D/s relationship, I'm the submissive. I greatly enjoy my position as it feels very natural for me. =) Before I really started exploring BDSM, my brain and I discussed the possibility of me being more of a Dom, but we quickly agreed that I'm much more submissive. =)