I remember having a rough time getting through Wizards. The animation looked good but at some point it looked like they ran out of money. Sort of the same problem with Rock and Rule. The animation was really neat at the time but the story was weak. I actually rewatched that one after it started getting discussed here and the music sounded horrible. Considering the talent involved that's a shame. If you liked Rock and Rule I recommend The Devil and Danial Mouse. It doesn't have Debbie Harry or Lou Reed but Nelvana did a nice job on this precursor before Rock and Rule.
One that I totally liked as a kid was The Last Unicorn. Might have to check that out again to see how the memories hold out.