The dystopian society setting is probably my favorite for story telling. It's where the characters' resolve is sure to be tested. I try watching every dystopian films I come upon, even the B movies, as you say. It's for the entertainment, of course, but also as a student of philosophy, anthropology, politics, etc.
Definitely one of my favorites as well. its lets you take a unique idea and extrapolate it to the Nth degree. Gives you a chance to try and see the future...
Well said!