I do like the good ones a bit better, because I appreciate the twist. They're rare, particularly the ones who do stuff for the main characters' sake like Eriol. Maybe it's because the first character of this kind I met was one of the evil ones -but I still like Xelloss quite a bit :3

Usually it comes from idiots and very young people in my experience.
I've seen people older than me bashing characters like they're thirteen ;_; And not precisely two or three. I'm more lenient to the younger ones because I also bashed when I didn't know better, but if they're adults and have been in fandom for ages and still behave like that? Damn.