I guess my guilty pleasure amongst some of my friends are games with deep narratives. Most of them don't really appreciate games in stories. I like to sit by myself and do things to really get immersed in a game and find out what all the characters have to say. On the other hand, I had a friend playing Twilight Princess in my room earlier this year who just tapped A to get through all of the dialogue so he could keep exploring. It gets worse if there's a game with a romantic story that I get immersed in; I can't retain much of my man-cred while saying I nearly weeped from some emotional relationship thing in a game.

I don't feel guilty playing them, though, just discussing them and admitting that I appreciate games as an artform and not just as slashy shooty kill kill boxes.