Walked out of Willow (many many years ago),
Brady Bunch Movie (boyfriend at time was desperate to see it, for me it was the equivalent of nails being scratched down a blackboard from the opening credits)
Thin Red Line (don't shout, I am sure its excellent if you are into that kind of film, but we're not so we walked out and straight into You've Got Mail....also dross but for me more watchable!)
Saw the stage version of Chicago and fell asleep, saw the film version of Chicago and fell asleep, watched the DVD of chicago and fell asleep...there is something about that storyline....
also turned off the DVRAB Catwoman (so, so dire) and the remake of Willy Wonka and Chocolate Factory (there was no need for this film to be remade, especially not like this! The original is a CLASSIC)