I have not, do not, and will not ever classify myself as a brony, as I have been a fan since childhood, however, I DO love the show, I AM loyal to it, and unfortunately most of the people I've seen who classify themselves as a brony tend to be trolls
or doing it for trend. So I typically don't talk about MLP, because I don't want to be lumped in with the "she just loves this new trend" group.
BUT for those who are just simply new to the show and DO genuinely love it, more power to them! I just think they should join MY group of being "just MLP fans" rather than following the whole "trend" thing