A "quick" list could never be complete. XD
Oof, let me just rattle off a handful from the top of my head. If there's something specific you're looking for, though, it's probably easiest just to ask, as this list will not be comprehensive.
Kissing, holding hands, blushing, spending quality time together, family outings, comforting each other, gardening... what do you mean that's not what you're asking about!? D:
Hmm, fine, fine...
Pregnancy, lactation, cheating (technically including NTR, but only in your favor, not against you), yandere, consensual, non-consensual, hypnotism, interspecies (fairy, wolf girl, minotaur, bunny girl, fire elemental, succubus, fish ladies, a particularly sexy goblin, etc), age gap (mostly in the form of milfs), oyakodon, size difference, both male dom and fem dom, slave, nun, small boobs, medium boobs, big boobs,paizuri, oral, vaginal, anal, creampie, bukakke, feet (easily avoidable, if, like me, you can't stand them), tomboy, business woman, humiliation, glasses, cosplay, mff, teacher/student, naked apron, swimsuit, hidden sex, public sex, bathing, spanking, very light (so far) BDSM...
Alright, I'm going to stop, now, but there's more. If you're really into a thing and I didn't list it, just ask. It might have just not come to mind.