What would you say is the absolute worst movie you've watched all the way through?
Oh wow - there are a lot of contenders.
I have a high tolerance for crap, and I can usually find some way to be amused. I mean, I’ve sat through Birdemic, but we laughed our asses off the whole way through, so it wasn’t a total waste of time. Blood Waters of Doctor Z had one of the most hilarious lines from anything ever, that made for one of the best MST host segments ever.
Some things are just too bitter, mean-spirited, cheap, uninterested, and/or tawdry to find any amusement in, though. Viva Knievel was one of those; for a vanity pic it sure made him look like a smug asshole. Swamp of the Ravens was another grind through an uninteresting plot and awful people. Films like this tend to be an endurance exercise more than anything else - like Invasion of the Neptune Men; why did so many people come together and work for so long to make something this dull and unwatchable?