When I was little, I had an immaginary friend, but I don't know if the latest qualifies or not: Last year, I kept getting dreams and couldn't sleep, so I got up and started writing about the dreams, this resulted in my Paranormal Book, "Immortal Relations" which has some of what my own father did right after WW-II when stationed in Europe. The vampire story of good vamps vs. evil vamps, takes off from there!