I'm struggling with this. I really deeply loathe watching movies, but every time I make myself do it I'm glad I did. They're such an ingrained part of our culture, and some of them tell wonderful stories.
It took me about 7 sittings and a couple weeks to get through Anchorman. I go see weird independent films in the theatre sometimes, and that's slightly easier but still not something I ever look forward to. I used to think my attention span was the problem, but I can read for hours at a time, and I'm pretty good at throwing vast amounts of my life into the black hole of the internet. Eh.