I published, privately, a collection of my serious poetry I had written over the years. I only published 50 copies, which I gave to friends, in a special deluxe edition. It was ridiculously expensive but I'm glad that I did it.
But my family's really close and I was interested in what Mommy and Daddy did for a living. So when Mommy and Daddy had a script that wasn't totally age inappropriate, they would let me read it. And we would talk about it.
I think it's necessary to identify with anything - with any character you play, there's got to be something in common, so you can link up to that person, even if it's like one tiny thing. But it's equally fun to play somebody completely different, and trying to find what that thing is to make it.