It has to be a tie between Conan the Barbarian (1982) and of all things, Kingpin (1996). Conan is absolutely my favorite movie. I never get tired of watching it or listening to the soundtrack. Kingpin, well, I made it my job to introduce as many people to it in college as I could, armed with a single VHS tape. For better or worse, I know I've spent over 24 hours of my life watching Kingpin.