These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Animation Age Ghetto: Most of his films and television shows were intended for adults rather than children (his first full-length feature, Fritz The Cat, was actually rated Xnote which is the equivalent of the R or NC-17 rating today and had nothing to do with pornographym, even though some of the sexual scenes and scenes of nudity did border on the explicit), but due to the medium in which they are filmed they are almost invariably mistaken for children's movies by modern consumers.
Cult Classic - His entire filmography is about as underground as you can get. Even the kids shows he did (Tattertown and Mighty Mouse) aren't considered mainstream.