Fantasy, and one of the most interesting worlds in my opinion is the one from the Manga/Anime called 'Made in Abyss'
It takes place on an Island that has a massive deep hole in the center of the village and has a variety of different alien-like biomes. Once you descend past a certain point you can't return to the surface.
I like the fantasy modern genres, like monsters and magic, but in modern settings because it allows for some really creative combinations of technology and magic
Medieval and post apocalyptic are the most cliché but can easily be good if well done, I also like survival themes like abandoned on a place or traveling to another place
I actually like running the gamut between extremely high(or sufficently advanced) fantasy, high scifi, or a fantasyic/scifi hybrid. Urban fantasy used to be my jam, but I'm trying to take a break from it.
Doing things you are not supposed to. I mean "Exceeding expectations" not "Taboo". Like conquering all the Viking realm as an exile in Mount and Blade, becoming hollow instead of actually finishing the game like in Dark Souls 3 or hooking up with a loli