I've spent way too many hours scrolling through ao3 tags for this fandom, and what grabs me isn't the cosmic stuff, it's the quieter moments. The family dynamics tropes, specifically. Found family gets played out a lot, but there's a brutal edge to it here because it's Rick who's doing the 'finding'. He didn't choose this, he's stuck with Morty, and vice versa. That forced proximity creates this awful, beautiful tension.
Slow-burn emotional exploration of Rick's nihilism crumbling is my jam. Not the big speeches, but the small tells—him fixing something for Morty without being asked, a muttered insult that's a fraction less biting. Hurt/comfort where Morty is the one providing the comfort, even though he's the one who usually needs it, just hits different. It flips their dynamic. The emotional engagement comes from the sheer improbability of any genuine connection surviving in that universe, so when a fic makes it feel earned, it's like a minor miracle.
I keep coming back to fics that use the sci-fi as a metaphor, you know? A malfunctioning portal gun isn't just a plot device; it's Rick's inability to escape his own head. That layer makes the emotional payoff so much stronger than just another adventure.