I like really weird movies. Like "What the hell what just happened?" stuff. Anything that screws with perception of reality or is extremely surreal or philosophical. The gorier the better, though I hate just hack and slash serial killing stuff. I just want bizarre and strangely filmed. And I like them to be dark.
And nothing generic like Waking Life, Pi, Doom Generation Dark City, etc.
You want a strange, gory movie? Try "Delicatessen." It's French, so find one with subtitles. It's not well-known here in the States, and is definitely bizarre, but from your description I think you would like it. http://www.imdb.com/title/tt0101700/
The movie Naked Lunch, is like watching your brains leak out of your nose.
Jacob's Ladder is also quite a head scratcher.
RepoMan (Not the Opera, Not Repo Men)
Freaks is an old black and white movie that was banned during the time. Tame today but still strange.