I can't wait to see what you come up with! I have so many ideas, and I really hope you do them justice.
Things I like: Gen fic, case fic, and quiet walks on the beach where people hold each other's hands.
Things I think are bad: Smut. (But it's only smut if it's ut-terly without redeeming social importance!)
Kaomoji: (屮ಠ益ಠ)屮 telling the sad and glorious tale of how she met, loved, and lost (♥ﾉ⊙ヮ⊙). In a highway diner on the road to FFA, she found a (●ↀωↀ●), lost and running scared. (屮ಠ益ಠ)屮 picked up the tiny (●ↀωↀ●), a strange and powerful sense of cuteness nearly overwhelming her, and was immediately accosted by (♥ﾉ⊙ヮ⊙).
“My (●ↀωↀ●)!” (♥ﾉ⊙ヮ⊙) cried out, lunging toward (屮ಠ益ಠ)屮. “You found her!”
Reluctantly, (屮ಠ益ಠ)屮 returned the (●ↀωↀ●).
I think this story would actually work best as epic fantasy in the vein of Game of Thrones, where (●ↀωↀ●) takes the place of the one ring and they have to go to the vet to get her spayed so she’ll stop corrupting mankind with (●ↀωↀ●)s.
Dragon Age: Iron Bull is a collector of Royal Dalton fine china from the 1890s, with a side interest in Dutch cream pots. Fenris is a thief with a grudge against the china collecting bastard who kept him as a sex slave, and so he steals and sells china.
He comes across a particularly fine collection in the home of Dorian, an avid collector of postage stamps who inherited his father’s collection of china. Fenris steals it, and sells the lot to Iron Bull, who is delighted at the fine condition of the saucers.
Dorian tracks downs Fenris and through him, Iron Bull, and though he doesn’t wish to be sexually attracted to either of them, he winds up the meat in a china collector sandwich within ten minutes of walking into Iron Bull’s climate-controlled collection room.
Aladdin: Aladdin was a prostitute and not a thief, and Jafar hired a lot of gay hookers instead of trying to take over the kingdom. Fisting with magic, fisting without magic, and tying Aladdin to the bed and violating him over and over, please.
One Piece: Mihawk went from having no kids to two kids in just one day, and if those sweet summer children think they’re going to the Grand Line without him they have another thing coming.
AKA, over-protective parental Mihawk stalking Zoro and Perona all the way to Shabondy. Then kidnapping Perona and almost drowning both of them when her ghost make him so depressed that he falls into the ocean, but persevering just enough to get her to the Thousand Sunny.
Then Mihawk sneaks off in the night while Zoro and Perona fight over who is stalking whom, neither realizing that the answer to that question is Mihawk, full stop.
He’d tell them, but they got so testy when he suggested they stay home for the rest of their natural lives. Mihawk’s just doing what’s best for them, and what’s best for them is Uncle Mihawk watching them like a fucking hawk to make sure they survive the Grand Line. And he can only do that if they’re together, and they’re only safe if he cleans out all the islands they could visit before they even get there.
Naruto: Itachi is pregnant with Monkey D. Luffy’s child. He’s pretty unsure about this development, but he’s only got nine months to catch up with the Pirate King and ask him for baby names, so he takes off ASAP. His bro, Kisame, volunteers to come along on account of really having missed the Grand Line, procures a ship and builds Itachi an adorable nursery.
Will Itachi stay faithful to his one-night-stand baby daddy? Or will Kisame’s superior nesting instincts woo him into infidelity? And will Itachi’s problem solving skills ever improve past murder and lots of it?
Ranma 1/2: Ranma decides he wants to be the center of a gang bang in his female form and asks Ryoga for help. Ryoga has no idea how to set up a gangbang, and kinda fucks it up. But first he breaks in both of Ranma’s virgin holes!
Beauty and the Beast: Gaston wins, but doesn’t kill Beast. Instead he muzzles him and parades him through the streets like the spoils of some foreign war. And when the village cries out for blood, he hesitates--and Belle begs for Beast’s life.
Gaston puts Beast in the kennels with his dogs and marries that girl. Marries her good and proper.
The he takes her out to the kennels, strips her in front of where Beast is chained, and fucks her hard. And she likes it because no one fucks like Gaston and no one sucks like Gaston and no one twists and thrusts quite like this, Gaston!
Seeing Belle get fucked in front of him arouses the muzzled and muted Beast, his monstrous genitals sliding free of their animalistic sheath, and Gaston has a wonderful, terrible, idea.
Pokemon: Wally didn’t become non-sickly from long, healthful walks with his pokemon, he became non-sickly from vigorous semen infusions from every male pokemon and trainer he met on the way to Victory Road.
But you only really need to write the first, with Virgin!Wally, his Ralts, and the Poochenya hiding in the tall grass. Knotting, please (grass knot only acceptable if you do the weight calculations and show your work).
Historical RPF: Hannibal Barca is stuck in the Alps with a couple hundred elephants, and nothing to do.
So he picks a pretty soldier who has commit a minor transgression and makes him take all the elephant cock, one after another.
That soldier is Scipio Africanus’ spy, and when he reports back and Scipio is debriefing him via ass-fucking, as the Romans did, he notices that it’s like a hotdog down a hallway down there, and drags the whole story out of his slutty soldier.
Enraged, Scipio finds Hannibal’s spy in his ranks and has him gangbanged by every soldier under his command and most of the horses before sending him back to Hannibal.So basically epistolary fic via spies and graphic bestiality and gang bangs.