I've always liked the Treehouse of Horror episodes, but they aren't always my favorite toys (except for Kang and Kodos, which I don't have). I'm glad the last planned THOH set wasn't made, as it didn't seem like such a great idea.
THOH 16 was ok, but not a classic. Still, I started cracking up with the appearance of the Herbie Hancock "Rockit" robots in the AI segment. Haha.