I have absolutely no idea what to write, so apologies if this isn't actually helpful. Hopefully there'll be something useful in it!
Request 1: Black Jewels
Threesome: Ranon/Shira/Cassidy
Moresome: Gray
If you run with the moresome option, I'd love something with Ranon, Shira, and Cassidy helping Gray through one of his bad nights -- because I see him as still having those bad nights where he's still incredibly fragile even after coming into his own, never mind that those nights might be few and far between nowadays.
If you run with just the threesome option, I'd love something with Ranon and Shira showing Cassidy that yes, she is very much wanted. (If you run with this, preferably before her relationship with Gray begins.)
Request 2:
Fandom: Black Jewels
Threesome: Karla/Jaenelle Angelline/Daemon Sadi
I'd like something set post-trilogy, where Daemon and Jaenelle show Karla that just because she's been injured doesn't mean she isn't still wanted... both as a Queen and more. Whether Karla's in a depression or just having a grumpy moment or something in between is completely up to you.
Request 3:
Fandom: Primeval
Threesome: Abby Maitland/Hilary Becker/Connor Temple
For this one, something AU in season four, not long after Abby and Connor come home. Whether it's a slice of life in an established relationship, or Abby and Connor dealing with Becker and his awkward attempts at showing them he's interested, or whatever. I just want their adjustment to post season-three life to play a part in things as well.
Request 4:
Fandom: Vampire Diaries (tv show)
Threesome: John Gilbert/Isobel Flemming-Saltzman/Alaric Saltzman
For this one? I would absolutely LOVE something where John is involved with Isobel and Alaric during the crumbling of their marriage. Or else maybe he's involved with the two of them right when THEY first get involved.
In general: If you can't do any of these suggestions, I'm a big fan of angst. A big, big fan. So give me something angsty -- with a hopeful ending, if not a downright happy one -- and I'll love you forever.
If you need more beyond this, contact