Ive never worked of the premise that one can turn on and off who and what one is as if changing one's shoes. You can play a role like an actor would, but it has nothing to do with becoming that role. The actor is still an actor, no matter what role they are required to temporaraly pretend to be.
No matter how many times Ive tried to turn away from what I was while on my journey of submission, Ive allways come back to the realization that doing so is to deny myself.
But I also don't see domination or submission as one of those things that fit into some neat little box of definitions. There is a much more fluid dynamic involved depending upon a wide variety of factors as to weather one behaves more dominant or submissive when interacting with another.
It's perfectly natural from my experience to be dominant in those areas where I eaither sence a lack of dominance in another or an outside paramater exists creating a requirment to assume a more dominant behavior, such as when I am teaching a class, or baby sitting my niece etc etc; just as when nessesary to submit to those who hold authority over me as the case may be such as my Proffessor, or my boss at work or my Owner.