There are... a lot of tropes I really like. I love AUs. I especially love high school/university AUs. Miscommunication and misunderstandings and idiots being oblivious are also beautiful. Specifically for kinks, I love D/s, or A/B/O. Power dynamics, protectiveness and caring and intimacy... Threesomes. Polyamory.
For AUs, I love the mutliple settings. The way the dynamics remain the same, the intricate plots replayed and remade to fit in a different setting.
Miscommunication - I love angst, I love to see characters brought low, and I like to see the stupidity, the sheer idiocy
that my favorite characters can (canonically) get themselves into.
D/s, A/B/O, power dynamics, even Sentinel/Guide - I really, really love to see that play out. To see the intricacies, the love, the protection the dom/alpha gives... I just really like that. It's something personally amazing and lovely.
Polyamory/threesomes is fun for the same reason I like (mis)communication, because seeing people fit together is amazing.
(Also, through all this, angst and pain that characters get over or are comforted for - that goes through everything.)Recs:
I... don't know. Like, I know what I read, but they're so far back in my history on Ao3...
I'll try and do at least one fic for each one I listed, though. So:
AUs: High fantasy story Descent
, by Teyke and a utopia story (and the problems with utopias) New Metropolis
by Amuly. (both Avengers)
by Vendelin (another AU, too, from Teen Wolf) and His Fate Will Be Unlearned
by Scifigrl47 (just... assume almost all of these are AUs unless otherwise. Also, Avengers.)
D/S / A/B/O: Hello, Heartbreaker
by Astoryaboutwar (Teen Wolf) and this absolutely beautiful story The Edge
Polyamory/threesomes: Put Away Childish Things
by Arsenicarcher (suprisingly, not built like an Avengers AU, but the polyamory aspect is in fact downplayed; it's focused more on rebuilding a broken OTEveryone).