i look at it like this: i'm naturally good at english and humanities. i could be very good at math and science if i worked extremely hard at it. i'd personally much rather stick with what comes to me naturally and what i most enjoy, t hough. likewise, i'm naturally a submissive...i could work hard at it and possibly become a very good domme, and i have switched in the past, although not much and with very little experience...but i am most at home with my submissiveness.

i think it's possible to "learn" to act as a dominant or a submissive, but i think it's probably much better to gravitate towards what you are naturally...and i definitely think that there's a combination of nature/nurture that leads us to be who we are (submissive or dominant). it can go both ways.