What details do you appreciate?

I’m a dungeon master in a lot of my spare time, but if there’s one thing that trips me up when making campaigns, it’s designing the cartography and locations. It’s not that I can’t, but I get really fussy about design details; does this landscape make sense geologically, what aspects of city life should I focus on, racial distribution and infrastructure, the kind of things that most players don’t miss but that I’ll feel if I don’t include.

So my question is, if you’ve played any kind of table-top, RPG, role-playing anything, what aspects of the game do you appreciate? What aspects of society do you wish were more present in games? Do you have any tips for fabricating landscapes and countries? That sort of thing.