Piggybacking off of Medusa's post....
I think some of the that is the same for me. I'm not into submission, but I am into service. I like to do things for the people in my life....partly because it makes them feel good, and partly because it makes me feel good.
And, yes, I confess there's a little bit of the superwoman thing too. I have prided myself on always supporting myself, working, taking care of my son, maintaining a home, putting myself through school, getting an advanced degree....and still being able to bake from scratch or make my own jam.
My pushy broad peeks in too....and I'm just as liable to be pushing the people in my life to do better, which I'm sure can be rather annoying.