If you allow the first 2 reject types you will get a world with only Dwarves. There is an ocean to the left and a mountain range to the right. Quite a bit of the land is terrifying or haunted.
Not one, but two decent spots to build on. Neither have actually been built on yet, but one's gotta have precious metal, right? The game says they have: Magma Pipe, River, No Aquifier, Flux, and sand.