Disney's The Black Cauldron. Apparently it was so bad it like...almost killed off Disney animation for good? But I loved that shit as a kid. No idea why we had it, either. I was born almost a decade after it came out. Eilonwy deserves her place with the Disney Princesses, damn it!
I saw that in I think Carnegie Hall with an orchestra doing the music when it got released. The kids such as myself liked it but the parents were silent.