My #1 has to be Battlefield Earth. It's like watching a slo-mo train wreck, the predictable result of granting an egomaniac both an astronomical budget and complete creative control. I mean, whats with the tilted camera, John? Most Ed Wood films are fun to watch, but he is certainly not the worst filmmaker in history. A lot of obscure, micro-budget films from the 50s and 60s are as bad or worse.