Some films could have been good (or better) without interference from directors, producers, or prima donna actors. Here's one example: Paths of Glory - A great film, but Kirk Douglas had too much say in it. Stanley Kubrick would have done well to use a less known actor. Besides insisting on a shirtless scene (which I don't mind) but he insisted his character would be unambiguously noble when Kubrick wanted him to be more complex. He insisted on a happier ending. And for a French character, he sure did swagger around like an American! Can anyone think of any others?