I really, really love, um, all the ways you can abuse a trope. Like subverting/inverting, taking it to its logical conclusion either to reductio ad absurdum it or just because, worldbuilding the fuck out of this absurd idea, like okay if humans have soulmates, uh, all of human civilization would have developed differently and I'm gonna guess what that looks like, etc.

I am lucky in that trope subversion at least is occasionally, if inconsistently tagged, but it's really the meta-discussion of tropes through fic that is the interesting thing? Like "why do we find this interesting/sexy/etc, and how does that reflect on humanity as it actually exists?" And boy howdy, "trope subversion" does not really cover that...