I wouldn't want to put myself up for something that I didn't think I could do a good job on. I wouldn't to direct material I didn't feel I could serve, but I don't have anything against doing bigger pictures.
In England when you make a movie even the weather is against you. In Hollywood the weatherman gets a shooting schedule from all the major studios and then figures out where he can fit in a little rain without upsetting Metro-Goldwyn-Mayer too much.