That's EXACTLY why I to don't like the term of "brony" and "pegasister" either. The word itself has more negatives than good in the eyes of the general populous.
Oh ok, no worries. I still like it, but I respect that you don't want to be called it. I still don't think that being called a brony gives you a bad rep.. But ok, it doesn't really matter what you call yourself. You are still a fan of the show and that's what really matters.