Wrote a plotty, engaging longfic, for a juggernaut f/f pairing, in a fandom that (a) was huge at the time, and (b) is enduringly popular!

Madoka Magica is a show where all the main protagonists are girls, all the important relationships are between the female characters, and the little bit of canon het is almost entirely offscreen. So f/f shippers end up being most of the fandom audience in the first place.