1Fluttershy

No, I had it right the first time.

Overrated: Derpy Hooves (and every other background pony), Rarity, Luna, Big Macintosh, Trixie, and Chrysalis. Underrated: N/A

Most people that say they "want to kill" a character don't actually mean it, and just use it because it's an easier way to express how much they dislike a certain character. While that might be a bit extreme to say, there still isn't really anything wrong with it since hating a character is still just an opinion. That being said, a person isn't any less of a brony if they don't adhere to what the show stands for.

I agree with the general idea you're getting at (that each character has something about them to like), but there's some parts of your post that I disagree with... Just because you dislike a character doesn't mean you're not a brony. A brony is a fan of MLP:FiM outside the target demographic. Everyone is entitled to their own opinion, so it's not really a big deal if someone dislikes a character.