Movie > Games, Games > Movies.....

Much inspiration in the gaming world comes from movies - that is, many video games are made with movies as the source material (Iron Man, Transformers, Disney movies, etc.). Lately, the opposite has often become true, too - video games being turned into movies (Resident Evil, Halo, etc.) Which ones have worked well in your opinion - and which others WOULD be great to either turn into a movie (from a video game) or a video game (from a movie)?