I can go either way on this. It's fun to have someone to whisper the occasional snide remark to, or to critique the trailers with, and have immediate-gratification discussion as soon as the credits roll. On the other hand, it's also nice not having to coordinate with someone else, or have them whisper when you don't want them to, and be able to sprawl over seats, and not have to do what other people want to do after the movie.

I go to a lot of movies alone -- hell, I go to live theatre and concerts alone -- and I have no problem with that.