The new Transformers movies. Whenever I find out that someone I really like adores them, (which happens a lot, oddly) I cry a little on the inside. Everything I could possibly say about them has been said before, but I don't care. The humans (especially Megan Fox) are given too much screen time, the robots are ugly (seriously, what happened to character design?), the humor is awful, and you can't tell what the hell is going on in ANY action scene. What really hurts me about them is that they could have been awesome. They were just ruined by the worst director ever.
tl;dr version: Micheal Bay has all the film making ability of a brain-dead fish.