Seeing that only women have responded to your comment, I'll give you a mans impression. First off there is nothing wrong in going to the movies by yourself, even though going with someone else makes it more enjoyable. Second, be yourself after a movie, especially if your the movie type of person. Like if your into movies, like myself, you just act the way you want to act after a movie, that even means crying if you have to, not that I have ever cried at a movie, but it could mean it. But if the movie makes you sad or touches you, then dont act all not yourself and say, "what a stupid movie". Just state what you believe and stick by it. And if your trying to impress a girl and your not acting yourself, wouldnt that mean she doesnt know the real you?
i dunno... say if you go with a girl and she is all happy that you are going with her to see a movie that SHE really likes... and then after its over.. she is all talking about how much she LOVED that movie... i would have the heart to say that it sucked and it had no plot.. ya know? Although i wouldnt go saying that i wanna see it 5 more times either...