Name one film (that's based off a book) that's better than the book version. I can't think of any! But I was wondering if anyone else could.
I always respond to this type of question with:
"This request is very close to impossible, and here's why. When you read a book, you use your own imagination, feelings, thoughts, points of reference, etc. You're given background, interior monologue, and other elements in a generally acceptable way (whereas in a movie, such things often come across as cheesy or require great amounts of narration). You see things the way you want them to be. You find things you relate with in the characters, places, etc. You form an image of the author, the story, etc that suites your own desires (whether consciously or subconsciously).
Then you have a movie...that's primary function is to make money. Story-telling, morals, and such are secondary traits in the film-making processes. Thus, the movie will reflect what the director, actors/actresses, and general masses want to see, hear, experience, etc (eg..will pay for).
There are many who write books for other reasons than money. There are few movies that exist outside of capitalism, because movies themselves are astronomically expensive to produce."