What you want is a comfortable environment that you feel you can invent in. Because film is such a lumbering, technical, huge, great Neanderthal thing, it's hard to create that little space of peace, and calm, and creativity, and ease. That's what you want the director to create for you, so that when you walk on the set, you forget all of that, and the fact that it's costing gazillions of dollars a second.