I think the people who don't like being called that or hate the term are people who are full of themselves and are "too good" or something. It's dumb.
But yes I coin myself as a brony.
I don't like the title because I watch a TV show and I don't need to be called something because of it.
I also hate the title because it was coined for /b/ users who liked the show but then was taken for everyone else, yet another thing taken from 4chan.