I always watch the credits when I go to see a film for two reasons.

First, you see some quite amusing job descriptions. Assistant to Mr. Smith. Assistant to the assistant to Mr. Smith, etc... Animal Wrangler. (I can't come up with any good ones at the moment, but there are some real gems among those job titles.)

Second, occasionally the film rewards those who watch the credits with a final tidbit after everyone has been named. Possibly a particularly amusing out take, or some final statement by the main character. While rare, it's worth the wait just in case.