So I am pretty dominate. I never identified as a power bottom, simply because my definition was different. I figured power bottoms were referred to as such for the capacity on which they can take a pounding and for how long. Turns out, a power bottom is the term for a dominate bottom. (Learn something new everyday)
I can't say I am 100% bottom, maybe 95%. My fiance prefers to top, but will bottom for me on the rare occasion I need to top.
I've always enjoyed bottoming ever since I started exploring my sexuality. Why not? Its where our G spot is.
I can understand why some would prefer to be 100% top or 100% bottom. Its all about your body, what you are comfortable with, and what your preference is.
I prefer to bottom because that is when I will experience my most intense orgasms. I cannot cum from topping. Just wont happen. I can also top for hours, but after a while I just get sore and bored. Its more for me to exercise my dominance more.
The sensation, the climax, the passion. Taking control of a dick in my ass is just heaven to me.