Being that this was what I thought the other thread was when I first saw it, and had a couple ready to go, I figured we may as well get this one going too.
A couple movies that I watched even though I was not proud of it, and forced myself through the whole thing:
Blood Sucking Freaks
Semi-Pro (I wanted to stop watching it so badly, but I had to see if it ever had any redeeming quality - nope)
I'm sure I'll think of more