my fav smuts came from Ao3. I do like the futanari fanfics by snakebit1995, i like it 'cuz ir's kinky and there are no guys in it. i also enjoy browsing the yuri tag, although without filter, most of them will be YURI ON ICE fanfics.
the ones in literotica's pretty nice but most of them are kinda too western for my tastes.
as for my preference, I did write the stuff I like on ao3 as well, same username as here. although they can be pretty disturbing, especially if you don't like lolis. i mostly do F/F content though.