My agent says that I'm a 'repeat business guy.' If you hire me to come do a movie, I'll be on time, know all my material, be ready to go, have a good attitude. I'm here to work, so I get hired over and over again by the same producers. If you just be a team player on set you can work so much more of
You are still lucky - you have a certain type of people who keep buying your music - but then you can get typecast and have to keep making that same music, and you can change only slightly. It's risky to bounce around and change your type of music.

