Not sure whether to put this one in "good movies" or "bad movies," but it is made by serious documentary filmmakers and played the Toronto Film Festival, so...
Confessed cannibal Issei Sagawa monologues to the camera, his face often out of focus, and talks to his caretaker brother, who is revealed to be almost as deranged. We also see Sagawa's disturbing comic book reliving his crime and graphic perverted sex scenes, along with old home video footage of the two as happy children. A lot of it is very slow and boring, then there are really sick scenes that will make you want to turn your head away. I could not watch it straight through, had to take a break. CANIBA is very difficult to rate. I am glad someone documented these two twisted specimens of humanity with minimal editorializing, but the result is no fun whatsoever, and offers no insight to their pathologies, making it a very difficult watch on multiple levels. Of interest to sick thrill seekers and serious students of abnormal psychology. It's not released yet and will probably be hard to find; this belongs underground.