I'm not a huge anime fan myself, but certain ones do really fascinate me.
Felix the Cat: The Movie was an animated film that had rather poor writing and inconsistent animation. Yet despite its major flaws, I kinda like it and all of its strangeness.
Sgt Frog has a fanbase of its own. Like I said, it has some really dumb lines (particularly in the English dub), but I enjoy its kookiness, especially with Sergeant Major Kululu.