He's such an unassuming puppy dog that even cynical women in bars will go home with him. Oprah would have had him on if she knew he was in town. It's a pretty cool movie for a low budget indy, because the viewer lives pretty much entirely inside the murderer's mind, awake and asleep. Most chillingly, you feel his attitude about motivations and his choice of victims. He doesn't think about right and wrong.
Some guys create web pages.
He creates corpses. He doesn't choose his victims. They choose him. Clearly he wanted to make a movie where we don't feel revulsion for a mass murderer, but rather curiosity and fascination, and maybe we hate ourselves a little bit for liking him and secretly rooting for him. It's a pretty good movie, but almost totally actionless.