Have you ever written a Kolchak fic? One of my first fanfic ideas was a fic (that I have yet to write) where Sam Beckett (from Quauntum Leap) jumps into Karl. And this was before I had ever seen any fanfic on the internet (although I had read about Kirk/Spock slash fanfic from a David Gerrold column in "Starlog" magaizne).