The Mayday graphics set actually does make it look a lot like those old NES RPG's, in all their 8 bit glory.
The rooftops are not muddy, though that would work, instead they're just natural soil. Most maps have multiple soil layers. I shaved off the very top most layer, which is actually less fertile than the layers below because on the top most layers you get the occasional pebbles where nothing grows. Everything under that is pure soil, until you hit rock of course.
I really need to work on making my forts more organic and more "lived in" rather than sterile, efficient, and grandiose building, but I'm just really terrible at that for some reason. And the entire point of my fortresses is to make art! Everything goes into decorating masterwork items with as many decorations as possible, such that a single masterwork green glass gem can be worth 100k dorfbucks or more. It can buy out an entire caravan.
So I'm pretty much manufacturing artifacts. A single artifact of such value can take 5+ years of continuous crafting to bling it out to such a degree, but I'm decorating many items all at the same time. Its an ongoing process really.
In my forts I have four dwarven "castes".
Thanes do mining, stoneworking, healthcare, forge work, jewelcrafting, and engineering. They do not do hauling. They do decorate the hell out of things using metal melted down from sieges.
Citizens perform all farming and the blue crafting jobs, such as leatherworking and bonecrafting. Most of their time is spent farming, brewing, and decorating things with bone.
Rangers do carpentry and woodcutting, and also hunting or animal training.
Peasants are everyone else without any skills. They do all of the hauling and join the military.
Everyone gets a basic education of swimming, blocking, and dodging. Thanes get the advanced degrees, which includes metalworking, healthcare, and engineering skill, but their education takes far, far longer than everyone else. Thanes are not expendable. Peasants and citizens can be easily replaced, but not a thane.