We're number one! WOOOO!!!
This article says the Leatherface character is based on Ed Gein, a nutjob from Wisconsin. He was also the model for other characters like Norman Bates (Psycho) and Buffalo Bill (Silence of the Lambs). Apparently, he had a penchant for amateur butchering, mostly of people. His collection included wastebaskets and lampshades made of human skin, and even a belt made of nipples. His master-craft was a full human suit. Nice, huh?
Hey, it's October. I'm getting ready for Halloween. BOO.