I always let film credits play till the very end
I always let the credits at the end of a film play until the very end. I think it started because of some films having a hidden clip after the credits, and so I wanted to make sure I didn't miss out on anything. Now though, even if I know for sure that there isn't anything after the credits, I'll still let it play. It just doesn't feel like the film has fully finished otherwise. Plus it'd seem really abrupt to just suddenly switch it off midway through the background music of the credits, the music is a nice steady departure from the film instead.