There are always good parts. They may not pay what you want, and they may not have as many days' work as you want, they may not have the billing that you want, they may not have a lot of things, but - the content of the role itself - I find there are many roles.
As long as a film stays unmade, the book is entirely yours, it belongs to the writer. As soon as you make it into a film, suddenly more people see it than have ever read the book.

