I completely agree with you, Lauren. I find Frollo a fascinating villain, because of how incredibly complex he is. He's completely messed up in many ways, but there's still something human about him too, since he was capable of loving (for want of a better word, I wouldn't exactly call it love but yeah) Esmeralda. This caused such inner turmoil in him (as seen in "Hellfire") because he was basically torn between his belief and his feelings for a gypsy. That in my opinion makes him the best Disney villain ever, because while he's incredibly cruel and vile, he is also relatable to some extent.
I personally think HoND is way better than Mermaid and Beauty and the Beast (although I LOVE those two as well, especially the latter) but hey, each to their own

What I really like about this movie is the mixture between humour and drama, which is something it's been criticised for I believe, but I think it really works.
I just wish more people would give this movie a real chance. Just because it's not the best movie for very young children doesn't mean you shouldn't let your kids watch it ever =/ It really does teach many valuable lessons. It's stunning to look at and has beautiful music. What's not to love? =/