It often feels like a tremendous amount of work is required to get an idea moving forward, like pushing a train uphill. But at a certain point, the thing takes on its own momentum, and takes unexpected turns. So it's that feeling of holding on, rather than pushing it, that is the most exciting thing. It's that need to occasionally bounce off the walls, letting anything happen for any reason, and having nothing to guide you that is the joy.
Danny Elfman