Sorry for doing this a bit late. Thank you so much for reading this (anyone reading it), and specially you my dear writer.
I only have a little bit of things I don't want to see: rape/non-con (romanticized or graphic, but it's fine is just a plot device or mentioned); scat; watersports, gore, and vore.
Some of my favorite things are: mpreg, romantic slice of life, plot and sex, light bondage, sex toys, unusual families. I also have some posts about it
here (general taste) and
here (other letter exchanges).
For the specific fandoms, read bellow.
Hunger Games Series - All Media Types
Gale Hawthorne/Peeta Mellark
Peeta Mellark/Finnick Odair
Katniss Everdeen/Gale Hawthorne/Peeta Mellark
For this fandom bittersweet is fine, as is happy ending and a completely out of the way AU. It's super cool if you twist the cannon, stories with them inside Distric 13 and having to adapt the austerity or something with them moving from the known Panem.
If you go the slash route, for Gale/Peeta I would love to see the rivals seeing more of each other, or both of them not being chosen by Katniss, or even how they would move on if she died. For Peeta/Finnick I would love to see Peeta taking care of a fragile Finnick (specially if Annie didn't survive and if Katniss got together with Gale - or everyone lives, but they can't work a relationship, but become friends), they building a simple but nice life, Peeta cooking for Finnick, and him teaching Peeta how to fish and hunt.
For the het, I usually don't like het, but this fandom shook me over and made me want a triad setting so much! So please happy endings! I really would like to see them working out a way to be happy together, and that can happen anyway you choose, from Peeta and Gale being buddies while they are both with Katniss, or the 3 of them together. With kids, whithout kids, with Katniss and Gale fighting to be the provider of the family and Peeta being all domestic on them. I would love to see moments of just Peeta and Gale, and Gale and Katniss.
Cardcaptor Sakura
Kinomoto Touya/Tsukishiro Yukito
Kinomoto Touya/Tsukishiro Yukito/YueFanfiction
AU's are amazing here, specially normal sorts, like barman/customer, dad/babysiter or anything that can show Yukito all sweet and innocent and Touya all awkward, trying to not push Yuki, but still going for it.
For the three of them, I just want to see more moments, sex, even if super light, intimacy, waking up together, trying to raise a family or just talking about it. Interactions between Yuki and Yue, even of the romantic sort.
Avatar: The Last Airbender
Aang/Zuko (Avatar)
Aang/Katara/Zuko (Avatar)
I think Zuko could learn a lot from Aang and Katara, specially of how being loved without conditions, without restrictions. Aang and Zuko playfully training together, Katara fending off the jealousy and showing them how it's better with three. Romantic vacation, Au's where Aang/Katara meet the cute gotic guy and bring him in their relationship, or them, married and with kids and working a triad with him. On just Aang and Zuko, anything with Aang at the Fire court teaching people to have fun, things with them older and Zuko being a single parent (he married Mai, but it didn't work).
Marvel Cinematic Universe
James "Bucky" Barnes/Steve Rogers/Tony Stark (MCU)
Steve Rogers/Tony Stark/Thor (MCU)
James "Bucky" Barnes/Steve Rogers/Sam Wilson (MCU)
Bruce Banner/James "Bucky" Barnes/Tony Stark (MCU)
Bucky deserves hapiness, ok? Just give the boy hapiness, and lazy mornings, and boyfriends team tagging him (in bed or otherwise), to show him how much he deserves hapiness. Angst is fine, great even, I don't espect him to be always happy and blissful, but I want him to enjoy the new century. Would love Tony spoiling him rotten and Steve loving it (if he is and if he isn't in the relationship). If you choose the one with Sam, well, please, Sam being his lovely self and showing both Steve and Bucky a good time, I will love you forever if he the top and maybe even if he is a bit of a dom. If you go with Bruce/Tony/Bucky, I would love Bruce feeling safer to be with Tony, when he knows Bucky is ver capable of handling the Other Guy (I'm also game for Hulk appearing and being supportive of Iron Man and Metallic Arm Man).
For Steve/Tony/Thor, well, I'm always wanting some Tony overstimulate by his big blonde lovers, or Steve being spoiled by Tony and Thor (specially if first they compete and later they tag team them).
I would love if any of this where kept in the cannon world, just because it's hard to find good stories of it, but anything is cool.
All of these are suggestions, so please don't feel pressured. I just wanted to give a general feel of what I like. Thank you again!