Someone I met years ago explained to me the difference between a personality and an actor, a personality being Eddie Murphy or Roseanne Barr, and an actor being Morgan Freeman and Alfre Woodard or Marlon Brando.
“No one forces me, or any other writer, to sell a film option on the books. If you don't want to run the risk that the filmmakers may adapt your work in a way you don't like, then you don't sell the option. You know when you sell it that they will have to make some changes, just because film and TV a”