Cast Listings: by importance or order of appearance or both!
I much preferred cast listings in approximate order of significance. Going back to check the cast of a movie that you didn't see in the last day or two is futile when the cast is in order of appearance. It is too hard to remember such details. Perhaps, you could combine the best of both worlds by combining the two. Keep the listing in order of appearance but have some sort of flag indicating several levels of importance on the screen.