I bumped into this thread when looking for something else.
I know I'm hugely behind.
You have little to no control over your own life, so you enjoy playing God to your characters, only to find that they often outsmart you and go where they want to go.
Hey! I thought this was a generalized list, not just about me!
You know that fanfic writing is a total waste of time and that you will never make any money off of it, but you write anyway.
It's healthier than drinking, I've heard.