There is a theory that the more dominant you are in life, the more submissive you are in the bedroom (and vice versa) because it's a chance to relax and be different, losing your inhibitions or whatever. It holds true to a degree, but I don't have a preference of how I'd like it to be although I know some people do prefer it a certain way. To be deep; if you don't mind being either, but the partner you're with want you to be the dominant one; is he/she the dominant one by making you the dominant one...????