Eyeball is almost a minimal fortress. I have a magma smelter up, a hallway with 6 workshop rooms on either side, a 3x3 stairwell at the end, and a secret (?) lever room in one shop room with a gabbro door and hatch cover (passages forbidden until I need them), and I will soon get a row of levers connected to several other various things such as drawbridges, flood-gates, the entry hall filled with spike traps, drawbridge disposal rooms and drowning execution chambers.
The depot will eventually be built, the garnierite will be made into zinc bars and therefore crafts to sell, the wood gathered will be made into beds, the extra stone will be made into pots and other furniture, some exploratory mining will be done on the lower levels, and the bedrooms will be dug out in the levels of basalt below.
The entry hall turns one corner and will be filled with upright spike traps with ten per trap. All connected to one lever in the secret room. From what I've heard, upright spike traps never jam and drop the corpse and its death-drop on the floor when they retract, and stone fall (read:fail) traps deal next to no damage against any enemies.
Our main food supply will come from Plump Helmets which are never cooked, Quarry Bushes which have to be processed and cooked, the eggs and meat from our turkeys, and whatever meat or plants the caravans bring us. Drinks come from our own farms, imported from caravans, or brewed from above-ground surface plants that we have gathered (or stolen).
When it comes to trade, I differ from my traditional rules.
Trading away:
I will give any valuable or high-quality crafts, some bone crafts or totems and some raw materials to every dwarf caravan.
I will give some high-quality or valuable crafts, some bone crafts or totems, weapons, and furniture to every human caravan.
I will give some picks and some metal or stone crafts to the first three elven caravans.
Importing:
I will take some flour, plants, fish, leather, and some metal (ores) from the dwarven caravans and ask for more from the dwarven liason.
I will take some above-ground seeds and plants, fish, meat and a lot of bronze items and bars from the human caravans, and request more from the human liason.
I will take some wooden logs, some furniture, some weapons, and a lot of cloth from the elven caravans and request more from the elven liason.
After the first three elven civilization meetings, I will kill all of the elven traders, their animals, and take all that they carried into my fortress.
I will melt or use any and/or all pieces of weapons and armor from goblin invaders.