I will love to be able to match book characters to movie artist and have everyone due the same. That way everyone that has read a book and love a character can tell their perspective about which movie artist should play that role if the book becomes a movie.
This will be a simple website that lists all the best sellers. You find the book and roll down to the characters that you want. When clicking on the character you can type the artist that you find more appealing to play that specific role if the book becomes a movie. The website accumulates the votes and shows the most voted artist for each character.
Not sure about the business model here. Maybe only show the top 3 so the website can sell the entire list to movie producers? Hmm... Maybe IMDB should just do this themselves.