You sound amazing! You sound like you are in love (I think) and he is lucky someone not only accepts his CDing, but wants to give alot! However, IMHO, you should not really be so worried about whether you are going against the grain. A relationship is a 2 way thing and just as much as he may not be able to be something else than what he is, nor are you! If you really feel concerned, you should probably be open and ask the question.
Personally, I am open to being both submissive and dominating btu I could not say what is the norm... But whatever it is, its about how you both feel, and as you say, you already have amazing sex life! So dont stress too much about it and good luck!
Jx