For me, that's an easy answer - I fell in love with the show because of a brilliantly-written fan story (thank you, Susan Matthews, yet again). From there, it was the books and the magazines. Once I actually saw the show, month later, it was magic all over again. For others, it might not be as straight forward.
What say you, cousins? Actors or characters or is this a 'chicken or the egg' sort of question for some of you?