[DF] What's Distinctive About the Default Worlds of DF?

[Greg 1]

The question may be unfair because DF never tells us to default to any particular sort of world. But all the same, the GURPS DF game worlds I've seen tend to have similarities. Perhaps the most obvious one is that DF game worlds tend to be much more cosmopolitan than most dungeon fantasy. Due to all the race options for PCs, there tend to be towns where members of all the races live and hang out at the tavern together. A Pixie, an Ogre, an insect person and a half-elemental might easily all be seated at the bar.

So do you think there are distinctive features of the worlds GURPS DF games tend to default to? If so, what would you say they are?