Gregory Horror Show
A unique show, with episodes that only last a few minutes and artwork like you've probably never seen in anime before. It has some flaws (it can get fairly repetative, there's no sub, and its weirdness might put some people off), but it might be to your tastes...
(Youtube Sample 1)
(Youtube Sample 2)
(Youtube Sample 3)
(My avatar is a character from this show, btw)