reasons to write fanfiction (I'll start):
share a cool scene that popped into your head
evoke a particular emotion the canon makes you feel
song made you think of a character or idea from canon
make people feel the same way about a character you do
make dolls kiss for fun
explore ideas the canon hints at but doesn't do anything with
traumatize characters and make them suffer
coddle characters and let them rest
had an insane idea for a crack ship and now everyone needs to know
the author of the canon was wrong and must be fixed
use familiar characters to explore your own ideas and plotlines
canon is too short and you need to wallow in the universe of the story