I don't know if I've ever played a character who's close to me. There have been some elements of myself in different roles. Sometimes, I show one side of myself and then completely conceal the other.
I started on the use of the Internet for scientific communication. Our research group was one of the very first to make really systematic use of it as a way of managing research projects.
The instinct to impersonate produces the actor; the desire to provide pleasure by impersonations produces the playwright; the desire to provide this pleasure with adequate characterization and dialogue memorable in itself produces dramatic literature.