I apologize if i sound arrogant for suggesting things, since im not really a builder, but my suggestion would be ‘‘Squares’’ kinda like Stormwind from wow
So instead of decinding on one and be like ‘‘everybody have to build like this’’ i think it would be great if you picked a number of building styles and merge them together in a way, so you might have a dwarven ish district where the smiths will be placed, you might have a fantasy district where all the tailors and ‘‘mages’’ are located, have a ‘‘Nature’’ district where it might be grasslands or jungler and there are only build things on certain spots rather than building them all.
That way people might say ‘‘i prefer building fantasy style’’ ‘‘i prefer oriental style’’ ‘‘i prefer rough dwarven style’’ and there will naturally be builder groups and everybody can enjoy the building itself 