Aladdin with Hercules as a close second. There really are so many good Disney movies though.
I might have wrote it already, but my favorite Disney movie is definitely "The Lion King". All of the three. The first I like the most though.
I would have to say that The Hunchback of Notre Dame is my current favourite; it's dark, brooding, but at the same time made of polar opposites that make it a very respectable adaption of Victor Hugo's work. The top two songs I like from the movie are The Bells of Notre Dame for its humongous impact upon the viewer (a good thing, due to the fact that it's the very first song and the lead-in into the story); my second favourite song would be Out There, which is Frolo and Quasimodo's song inside the Cathedral. For one, it gives an actually valid opinion of Frolo's, which is that the world is cruel and wicked (let's be honest, if it wasn't a Disney movie and it was real life, I doubt many people at all would accept Quasimodo), and second it gives a resounding hope of Quasi's that he'll be able to one day see the world that's just beyond his grasp as he scales the architecture of Notre Dame Cathedral.