Just to note, I picked 20 as years in fandom because my first fandom was Danger Mouse, WAAAAAAAAAAYYYYY back in the day. Though, technically, I've been fannish since I was a wee thing. One of the first unfinished stories I ever wrote was a sequel to The Last Unicorn. I think my parents were a little unnerved when I spelled "Schmendrick" correctly at the age of four without actually having read the book.

Ahh, I remember that story. The opening line was:

"The Red Bull is back!" cried Schmendrick.

And thus began my foray into the world of fanfic.