its just not where my creative GM energy lies
Yeah I think realizing where your creative energy lies is pretty important as a DM.
For me, I know that there are two places I am very good at just quickly coming up with stuff for, where I am like, "naturally creative", and those are:
A) Basically "Mass Effect zone" sci-fi. Even before Mass Effect, the sort of area between military sci-fi and Star Trek was where I was and remain extremely comfortable. Unfortunately weirdly few TTRPGs occupy this space, mostly they're on either side of it, either being Star Wars-esque space fantasy, or on the other side, hard-SF-adjacent traders and mercs stuff like Traveller (which y'know could be seen as a proto-ME, but I don't think it usually plays out that way).
B) Higher-magic full-integrated fantasy. Not like, "high fantasy" or "epic fantasy" necessarily, but fantasy settings where magic is part of everyday life, like you'd probably see something "magical" most weeks at least, if not most days. Like, Eberron or Planescape for me is relatively comfortable in a way that, say, Westeros would not be. I'm not Mr Politics/Mr Intrigue either. Backstabbing and betrayal and misleading people and so on, I can do all that, but elaborate Machiavellian schemes? I'm not really into it. Or more to the point, I'm not good at coming up with them!
(It's funny of course because my players often read Machiavellian schemes into innocent NPCs, but I think most DMs have to deal with that!)
C) Silver Age comics supers, also pulp supers stuff. I don't even know why! I'm not even like, into that, generally speaking! But I'm relatively great (imho) at making stuff up for it as compared to the eras of supers stuff I'm actually interested in! Quite frustrating lol! My players aren't really into that either.
But maybe this should be a different thread?