All the characters in my books are imagined, but all have a bit of who I am in them - much like the characters in your dreams are all formed by who you are
When you start writing the magic comes when the characters seem to take on a life of their own and write the words for themselves.
After a while, the characters I'm writing begin to feel real to me. That's when I know I'm heading in the right direction
When I write for teens, I feel I can cut through everything and get to the bare bones. I can get straight into the emotional world of the character.
In "Faithful," Ray Bradbury is discussed a lot. The characters read "The Illustrated Man."