After watching Black Swan I realized something important about my movie watching. It will probably sound sort of bleak, but I have the best movie experiences when I'm watching a movie alone. It could be based on insecurity, but for me a movie is a very personal experience. When I watch a movie I want to completely immerse myself in it. Discussions, comments, everything like that can be left until after it's done. With an increased amount of people simultaneously watching the movie, the more inter-personal communication will inevitably arise, and the less I can immerse myself in the movie.
My best theatre experience was watching Hero in an almost empty movie theatre.