This is solving a genuine problem, and it's well executed, but there's no way I'm going to sit there manually rating enough films for the recommendations to be

This is solving a genuine problem, and it's well executed, but there's no way I'm going to sit there manually rating enough films for the recommendations to be useful. Have you considered: a) scrobbling a la Last.fm or b) turning the collection of user preferences into a game or a quiz of some kind? Good luck!