I have the same problem, although my total is probably only in the 80s/90s. I have tried to harness it for good by only watching The Dark Knight when I'm also doing schoolwork/revision/other undesirable things. It means you'll still watch it a lot and satisfy the craving, but you'll also be getting work done.
I also fully support watching other great films (Pulp Fiction and Reservoir Dogs are a nicely different style to Nolan), and getting into a long TV show. I'm currently a series into The Sopranos, and I haven't watched The Dark Knight for at least two weeks.
Though that said, I do have a couple of free hours right now...