If I do a human fortress plugin, then in another 1 month modding madness in the future, after my next tour. It would be aboveground humans that can trade with ALL races, and get race-specific workshops, like a dwarven blacksmith, a drow poisoner, a elf animal trainer, orcish war dojo, things like that. They would have a pretty extensive request/order system (you get a random item saying: This is a request for 10 items X and 15 items Y and 5 items Z, and once you have these items, you can do a reaction to send them to your capitol and get a reward) and would extend on the merchant stall system currently used in the dwarf mode.
You would also have some christian religion inspired church or cathedrals, monks, paladins, and some more militaristic empire with muskets and halberdiers.
Its probably either the humans or the elves. I thought about doing another fundraiser with poll, but not now. In half a year or so.