Do videogames doujin count? lol. All of Samwise's tbh. Samwise is my most favourite doujinka (is that how you call 'em?) because RikuxSora is in my top 3 OTP of all time, and they happen to ship them too; but what makes their doujins extra especial to me is that, they always colerrate them to the events that happened in the game.
https://s-media-cache-ak0.pinimg.com/736x/a1/19/79/a11979d9f43436db499e839c3007334c--kingdom-hearts-adorable-animals.jpg
https://s-media-cache-ak0.pinimg.com/originals/be/35/a3/be35a3b6444f3d3440c59079014c79dd.jpg
https://s-media-cache-ak0.pinimg.com/originals/29/c8/be/29c8bea211f815a308d8a2edc5ea5436.png
They are just made for each other ╥﹏╥
Mangago has some of their DJs:
http://www.mangago.me/read-manga/kingdom_hearts_dj_crown/
You can still get the gist of the story by reading them but if you played the game (like me), the references about it make them 1000x better (⌒▽⌒)
One piece dj.. zoro x sanji - pirate ship noah
http://www.mangago.me/read-manga/one_piece_dj_pirate_ship_noah_1/
It is very well written, it has a plot and not focus on sex... :)
What's your favorite yaoi dj (one that's based from an already existing manga/anime). Mine would have to be Gusari's 13 cm and any aokise dj by escapizma and ogeretsu tanaka. Please share ones that you like (any anime would be fine). Thanks!