I get very involved in my characters and their lives. I feel their pain, fears, and joys. When they cry, I cry, when they laugh, I laugh. I see them in my mind as real and they are friends. My main character is a personification of things I would do or like to do. I have put my own emotions, thoughts and personality into her. The other main character has taken on the personality of a very dear friend of mine in real life.
My characters scream at me if I do not give them enough attention - they demand to be created and given a story to act out and a life to live.
Kinda sounds like I am very eccentric, but that is the only way I can create characters and stories, by putting myself into their minds, hearts and souls.
At least I am able to keep in the realm of reality and keep that separation from my characters - keep my own identity real...I think....