Other sentients

I've been thinking about having other races(to use the D&D term, "race" meaning sentient species like humans or elves or dwarves) in the Lightless. I don't really have to worry about making the setting even more unique, so I don't have to start from the scratch, although I don't want to make exact copies either. It's really a dilemma: On one hand I want humans to be the people around: when I introduce a character I don't want the first reaction to be "Is she human or elf or what?". On the other hand, I think exclusively human fantasy settings are rare for a reason: no matter how well you describe the humans, you're not going to get the same amount of "Wow" as you could get by introducing something new(or not so new. Just about everyone has elves. They're still better than having nothing but humans). Tolkien had elves for a reason(500-word rant and it's cause deleted. It was about the drow).

At this point I haven't decided yet whether there are other races(and I probably wouldn't tell even if I had. I'd like to keep my players dark about some things at least for a while yet), but they certainly wont be prevalent. Right now I'm thinking of having fey and dwarves. In fact, I've already decided that the fey exist at least in the legends: go beck in time far enough and just about everyone is either linked to religion in some way(a prophet, a saint, a...crusader?) or you can find a legend linking them to fey by being a fey, a half-fey, a fey-blooded or at least allied to the fey.

So, what would the fey be like(remember that all this may well be scrapped and even if it isn't, it's entirely possible that the fey don't come up)? Fairies are usually smaller than humans(varying from the size of a largish bug to child-sized). I think I'll go with fey being about 2/3rd's of a human size. Obviously they're superior to humans: they're not as strong, but they're faster, as tough(even though they're smaller), healthier, smarter and capable of flying. They also live in an area 300 miles north-northeast of the players starting point(just kidding...probably).

Dwarves are easier(same goes for dwarves). Since I don't want them in the same space as humans, I'll just move them to surface: instead of working with stone, they work with wood. Every dwarf is a master woodcrafter. Metals are not very prevalent, since they could bump into humans digging too deep(work THAT into Dwarffortress. I dare you!). Otherwise they're just standard dwarves:Hardworking, heavy-drinking, grumpy, violent short people.