If you've noticed that I don't use long takes, it's not because I don't like them, but because no one gives me the necessary means to treat myself to them. It's more economical to make one image, then this image and then that image, and try to control them later, in the editing studio.
As a producer, sitting on the other side of the desk, I have never once had an agent go out on a limb for his client and fight for him. I've never heard one say, 'No, just a minute! This is the actor you should use.' They will always say, 'You don't like him? I've got somebody else.' They're totally spineless.