I’ve been reading, watching, and gaming in sci-fi and fantasy universes for decades, and yet, it’s just not possible for me to care about them. High magic or low magic, FTL travel or post apocalyptic, whatever. It never occurred to me until I started DMing for my kid, and wanted to tune up some of the adventures. I couldn’t care what new monsters to introduce. I certainly was able to find some, based on the adventure’s theme and kid’s taste for weird, but everything was based outside stuff, I give zero Fs what color the dragon is, or if it’s some other monster.
Don’t get me wrong, I care about mechanics, stories, and personalities, but the set dressing and history of the universe, town, tribe, place whatever, the color or appearance of anything, and whether the baddies are yuan-ti or ettins or xenomorphs, I can work the interesting parts of a game with any. All that stuff is arbitrary.
And I should point out, I love all the minutia of settings and monsters, I just can’t “prefer” one over another.
Drives my kid nuts, “what’s your top 5 favorite monsters?” And I list by how interesting his encounters with were with them were. “But what’s the coolest?” Oh, stirges obviously, cause you and you’re mom think they’re so stupid and pointless.