Surely not a movie for everyone; perhaps the best example of a sociological character study if I've ever seen one. The insight into a psychopath is quite unsettling yet unfiltered. On one level, at least mine, it's kind of fascinating, even though it's also exceptionally disturbing.
"The days go on and on... they don't end. All my life needed was a sense of someplace to go. I don't believe that one should devote his life to morbid self-attention, I believe that one should become a person like other people."