Hunchback of Notre Dame - Visually beautiful and, speaking as a big fan of the novel, I was impressed by how much Disney actually kept in of the story. The novel is a HUGE downer, with a lot of commentary of the gray areas of morality and some very unlikeable characters. Some people don't like the gargoyles but I was OK with them, except I didn't like the song placement of "A Guy Like You." It should have been much earlier in the movie.
Robin Hood - I was 10 when this movie came out and Robin was my first cartoon crush. I had no idea the movie didn't do well in theaters, I just liked the character and the story. Nowadays a lot of it is too shticky and un-funny - and if you know anything about English history you'll know how much of an unfair shake Prince John gets in this portrayal (the real Prince John actually kept England together while King Richard was off killing Muslims in the name of Christianity and stripping the royal coffers.) I hear there's a remake and I'm pretty sure if it happens a lot of Prince John's more annoying character traits will be excised, including the somewhat bizarre trait he has of sucking his thumb and whimpering for "mummy." I mean, seriously, what the heck? Did Disney actually have writers who couldn't think of any of other way to make Prince John funny?
The Emperor's New Groove - like a lot of other people in this thread, I thought this movie was a LOT better than I thought it was going to be. Disney really botched the marketing on this one; I remember seeing commercials and thinking "Wow, that doesn't look funny at all!" I saw it on DVD and thought the story and writing was very clever and the characters were great, especially Yzma and Kronk. The voice work was very strong too.
Wreck-It Ralph - I thought this movie was great too, but try to find ANYTHING related to Wreck-It Ralph in any
Disney store or theme park. It doesn't exist. They have a few characters in the Halloween parade, but that's about it. The movie was awesome, though, and anybody who remembers the golden age of arcade games will get the nostalgia factor.