in regards to the drunkenness of dwarves, perhaps they have a different brain chemistry than humans, and thus get drunk off of water, as their brain needs alcohol to function. so a dwarf bed ridden by injury would drink water as it helps with healing, but would be drunk off his ass, while a healthy dwarf would drink alcohol to keep from being drunk. furthermore if different creatures need different things then trading with another civilization would be beneficial for goods they don't need but that you do, and vice versa. imagine if humans only drink alcohol occasionally, then good dwarven alcohol would be a luxury item to them, with a wider range of price that they would be willing to spend for it based on their own wealth, after all a poor settlement would waste precious resources on something that wasn't necessary. while a poor dwarf civ would pay for cheap alcohol pretty consistently, as it was necessary to their survival.
so i guess my question is this:
is there any plans for different civilizations having different necessities, allowing for different dynamics to the trading system, and (eventually) requirements when running a non dwarf fort, such as humans not needing alcohol to function, or maybe elves needing nuts as part of their diet (as dwarves need alcohol)?