DH bunnies
Okay so when HBP came out I made a list of HBP-compliant fic bunnies. I did not do a very good job of writing them, LOL (the only two I wrote I think were the Sirius/Remus/Tonks and the Tonks-kills-Fenrir).
However, I shall still do it again now for DH. So below the cut you will find fic bunnies I had while reading or have had upon further thought about the book. Feel free to encourage me if any of them strike you as awesome. :-p
epic novel-length Remus/Tonks that fills in all the gaps (yeah, don't hold your breath, I suck at WIPs and I suspect someone else will get around to this first and do it better)
the night Teddy is conceived and how the contraception mistake is all Remus' fault :-p
Neville/Luna/Ginny during their seventh year, because obviously Neville has become a Stud
Harry/Hermione comfortsex after Ron leaves
and in the baddirtywrong category: Grindelwald/Ariana with Dumbledore watching
Snape/Lily HOT SEX in which he's a virgin and she's taking pity on him
Tonks-isn't-really-dead-but-Remus-is fic in which she's a single mom and a bunch of different wizards keep trying to marry her to Do the Right Thing and she's not having any of it
more alive!Tonks fic in which she finds out that Remus was having an affair with Percy
post-epilogue Harry/Draco
Harry/Ginny and Ron/Hermione and Bill/Fleur as swingers
Sirius/Teddy Lupin with a Time Turner
Harry/Teddy, with references to Harry/Sirius, probably in the baddirtywrong category
also in that category, Bellatrix/Hermione during THAT scene
Percy/Draco in which Percy is MoM and Draco is someone Vaguely Important and Draco's pureblood wife is obviously a beard
Snarry, in which Albus Severus somehow manages to bring Snape back to life, and he's suddenly confronted with a Harry his age who's been saying nice things about him for 20 years
Meh, I could probably think of a lot more but those are the ones that immediately come to me. :)