I've done this more times than I'd like to admit, but only once since I've been married. I think it was the new version of "Evil Dead". To be honest it can be fun going to a movie by yourself, especially if you're like me and hate people who take it upon themselves to give movie commentary in your ear. The last time I went with some buddies from work to see "Krampus" and they wouldn't shut up the whole time!
Deadpool got my vote as well. No one has mentioned "The Man from Earth" yet? Best talking heads with a twist movie ever.
man from earth is awesome. Another good conversation driven sci fi movie is "Coherence".