General likes: angst, hurt/comfort, casefic/missionfic, hand holding, the forehead touch thing, and boxing aus
General dislikes: A/B/O, harm to robots (including nonsentient ones), and power imbalance.
Any combination of Uhura, Scotty, Sulu, and Chekov: what shenanigans do they get up to off duty? Who's closest to who? Who's the ringleader? Do they have prank wars?
Bashir & O'Brien: I'd love to see them in one of their holosuite adventures! Whether it goes wrong or not is up to you.
Any combination of Malcolm, Travis, and Hoshi: They've all got such different backgrounds - how do they connect to each other? Where did they start becoming friends? Does Hoshi teach the guys swear words in Klingonese? Are Malcolm and Travis workout buddies? Do Hoshi and Malcolm cook together? Do they tend to hang out in one person's quarters more than the other(s)?