I really enjoyed reading people's reasons for watching end credits, especially about respect for the people whose names are listed. I watch them but thought I was about the only one, there's such a mass migration when they begin.

I have mild Obsessive-Compulsive Disorder so seing the movie from absolute beginning to absolute end is the only way I'm comfortable, even if people I'm with leave when the credits begin.

Jackie Chan movies also have outtakes over the beginning of the credits. And Pixar movies list the names of the babies born to their people during the production. That's kind of sweet.

Also, the music that we hear in the movie is usually listed late in the credits. I think a lot of people stay for that.

In my experience, the ushers waiting to clean the theater are always polite about me watching. In return, I never leave trash for them to clean.