1) Specific Tony/Steve fic in which Omegas are the top in society & Tony actually keeps his Alpha status hidden because they're seen as brutes that can't control themselves.
2) Has anyone seen any fics in which Odin goes all "You will be punished blah blah" and gives Loki to one of the women? Or somebody odd like Heimdell or Nick Fury or, heck, Odin himself. Basically one of those fics that involve Loki becoming a slave/servant/some sort of punishment but not to any of the main Avengers (besides Natasha). Or one where he's depowered and captured by one of them? Or even one where he has to "serve Asgard"...and actually ends up doing that, not just Thor.
3) Any fics that deal with Asgardian courtship/dating - whether with other Asgardians or Midgardians. I adore nev_longbottom's "A Courtship" and am dying for more. Any character, any pairing.