I wouldn't mind an FxF pairing - in fact I can honestly say that all of my stories have the capability of being FxF - Although With demon-type FxF's I do like at lest one of the pairings to be a Herm or a futa, just as I feel it makes it more exotic then your normal pairings.

However; I do not do my stories based on pairings alone, I will look at a story long before I'll even think of pairings and even shockingly enough the romance element of the story. And thus you might notice in fact a lot of the stories actually don't mention a gender.