I'm not sure I understand why self-taught is inherently better than being formally taught at a university, other than the monetary costs. Going to an animation school isn't going to stifle your creativity -- if it does, you probably didn't have that much to begin with. Self-taught animators seem more vulnerable, not less, to falling into the trap of copying another's style, simply because they don't have a solid grasp of the medium's foundations and look to other people's animations for guidance.
Animation schools also have the benefit of setting up connections with other people in the field, and connections are pretty fuckin nice to have when degrees are starting to matter less and less.