NYT interview with Quentin Tarantino:
Q. I’m told that your scripts are really written. They’re more like novels than screenplays.
A. Yeah, they are.
Q. Since you’re the director, you don’t need to spell all this stuff out for yourself, do you?
A. I have a writer’s journey going on and a filmmaker’s journey going on, and obviously they’re symbiotic, but they also are separate. When I write my scripts it’s not really about the movie per se, it is about the page. It’s supposed to be literature. I write stuff that’s never going to make it in the movie and stuff that I know wouldn’t even be right for the movie, but I’ll put it in the screenplay. We’ll decide later do we shoot it, do we not shoot it, whatever, but it’s important for the written work.
When I finish the script I want the script to be so good that I’m tempted to stop, I’m tempted not to make the movie, because if I just stop right now, I’m the winner. Now I do make them, but I want the screenplay to be that much of a document. I rarely look at the script after that other than to just go over the dialogue.
For more of the interview, go here.