My GF loves all things MLP and has been ecstatic that series four has been so successful, means she has more to collect and buy (we are both in our 30s and no kids).
I have watched the majority of the series and find the cartoon just fine, with some really standout episodes and some boring fare that I don't care for. I don't like it as much as ongoing series like Steven Universe or Gravity Falls, but feel that it's definitely a step above almost everything else, particularly since it's aimed at young girls. Doesn't try to gross you out with the main characters obsessing over dating or makeup or w/e that would turn me away otherwise, so i enjoy being able to watch it with her. They cast magic, go on adventures to whatever, compete in sporting events, save the world sometimes, ect.
In reminds me a lot of the Powerpuff Girls back in the 90s, which was also very clearly aimed at girls yet was perfectly fun for anyone who enjoyed watching cartoons. I don't consider myself a Brony since outside of watching the show (and being a fan of Weird Al and certain other guest stars) I don't really have much else to do with the franchise.
Certain super creepy fanbase people aside (wtf at Cloppers???) I think the hatred is completely unwarranted and a textbook case of nerd on nerd shaming, which is the epitome of pathetic behavior. The vast majority of the base seems to be incredibly harmless or keep to themselves or both.
Edit: And I didn't actually answer the question! Bronies have to be male, right? Then I don't know any personally. What is the female term? My gf is almost certainly one.