I thought Constantine was the worst movie I've ever seen. I'm not brave, though - I don't even try to see movies where Hollywood tries to preach to me, so I've never seen "American Beauty" or it's ilk.
I like really stupid movies with good special effects. I do have to understand whats going on, though.
The best is when a movie gets really panned and you see it anyway, and find you like it.
I just watched Canstantine last night. I like dark movies, and it's pretty much all about dark.
All the "special effects" looked like "Lord of the Rings" Gollum outtakes.