You are awesome! Thank you for writing for me! I hope you'll enjoy making these ficlets as much as I'll enjoy reading them!
If you already have ideas, then go for it; I know they will be as rad as you are! If a little detail from me will make things easier/more fun you, then I'll ramble about fic in general and these particular fandoms below:
Do-Not-Wants: I'm fortunate not to have any triggers, but I do have a couple of back-button squicks that it would be great if you could avoid: romanticized/eroticized depictions of incest or rape are deal-breakers for me. I'm also squicked by most romantic/sexual relationships between characters who have a major imbalance of power. If you'd like to go AU, I'd prefer no a/b/o 'verses. If you're moved to porn, I'd prefer nothing that kinks on pain, fear, or danger/risk of death.
Stuff I love, in general: banter, found families, redemption narratives, outsider POV, gallows humor, h/c that's light on the 'hurt' and heavy on the 'comfort', characters playing poker, women kicking literal and/or metaphorical ass, characters who own their mistakes (even if they can't seem to quit making them), double lives/secret identities, and hopeful, if imperfectly happy, endings. Most of my favorite stories could be distilled down to something like broken people make a home for each other and/or ragtag band of misfits save world, one another.
Especially relevant to this fest: If you're interested in exploring any canonically Jewish character's relationship to their faith/heritage (or writing as Jewish any character who doesn't canonically identify with another religious/ethnic/cultural tradition), I'm totally down for that!
Since I mostly seem to be falling for Yuletide-sized fandoms lately, I've requested 14 in hopes of making matching easier; I'll be delighted with fic in any of them! In case you like to work from a prompt, I've tried to leave a general idea or highlight a character/element I love for each fandom:
30 Days of Night (2007) - This is a faintly ridiculous and fairly gory horror movie, but it also has themes of community and endurance and sacrifice that I've always found really moving. I'd love to see an expanded moment from the montage we see of the town under siege. I'd welcome OC's as gladly as canon characters here.
Agents of S.H.I.E.L.D. (TV) - Melinda May is my favorite character (by a pretty narrow margin; I love them all!) and my favorite part of the show has been seeing the cast of disparate, not always compatible, personalities come to understand and value and rely upon each other.
Banshee (TV) - One of the things I love about this show is its wallowing in identity porn - the tension between who the characters are now (Sheriff, PTA-mom, barkeep, gun-moll-in-training) and who they've been before (convict, safe-cracker, boxing champion, obedient Amish daughter) - and the flashbacks that hint at the paths between the two.
Fallen London | Echo Bazaar - I love the game's worldbuilding, and I never pass up a chance to interact with Devils or Rubbery Men or to learn more about the Correspondence, and I am a regular visitor to the Cave of the Nadir. (Needless to say, I also spend a bit of time nursing my Less-than-Laudable-Laudanum-Habit or tramping through the Mirror Marches.) I'd welcome OC's as gladly as canon characters here.
Fast and the Furious Series - Forced to choose a favorite, it would probably be Letty. I love the unlikely found-family that forms throughout the series, and that in between outlandish capers, they fall into these moments of easy domesticity.
Fringe - Every single version of Olivia Dunham is so brave and wonderful; and I love any time a character is confronted with the other-universe version of themselves or their loved ones.
Fullmetal Alchemist - I love the wealth of excellent female characters in this series; there is literally no one I wouldn't be pleased to read about. The manga is my favorite canon source, but feel free to write from the 2003 anime if that works best for you.
Hart of Dixie - I love that the show's drama all comes from the web of character relationships that comes from living in a small town; my favorite parts are when characters who don't actually like each other all that much (even if just for the moment) come together for the greater community. Zoe Hart is culturally Jewish but not religiously observant.
Hellblazer - One of the things I love about the HLB universe is that, in it, every kind of magic or myth or legendary creature or general weirdness can be true - and while that often turns out to be bad news for the humans involved, it can also be beautiful and uplifting. I'd welcome OC's as gladly as canon characters here.
Iron Man (Movies) - Pepper Potts is always awesome, I am pretty endlessly fascinated with Maya Hansen and the development of Extremis, and I also came out of IM3 desperately wanting fic for every possible supporting character, even some of the ones too minor to rate a name (seriously: Brandt! Chad Davis's mother! Happy's nurse!), so I'd welcome OC's as gladly as canon characters here.
Life (TV) - I love how Crews and Reese, though partnered under less-than-ideal circumstances, come to be an effective team, understanding each other's quirks, trusting each others' instincts, backing each others' plays. I also love every last woman in the supporting cast.
Once Upon a Time in Wonderland (TV) - In Jafar, the show has a literal Evil Vizier, who spends his time persecuting the rest of the cast. I love The Red Queen/Anastasia the most of all, but there's no character I don't adore. I'm only passingly familiar with original-flavor OUAT, so there's a fair chance any crossover might go right over my head.
The Sparrow - Mary Doria Russell - This is my very favorite book, and I'd be delighted with any fic in its universe, but I'd especially love something about Sofia's recovering the faith of her childhood and carrying it with her to a new world. (I have also read and loved the sequel Children of God if you're inclined to draw from its events and implications too.)
Sports Night - I love how the long hours and creative pressure of churning out the nightly broadcast make the cast/crew into a kind of family who love each other as often as they find each other exasperating. I really loved the Seder scenes in "April is the Cruelest Month", so if you wanted to expand on that episode or explore other ways Dan or Jeremy (or even Eliot or Will)'s Jewishness effects the day-to-day at CSC.
Thank you, again! I hope you have lots of fun writing in our shared fandom(s)!