Okay, I completely suck at construction and design, but what I'd love to see is:
A castle+underground fortress+massive tower+mountain. The first thing you'd see if you came here is a multi-z level wall, encircling the mountain, with one 5x10 drawbridge over a watery moat being the only way in, a wooden wall encircling the moat with only one z-level. Then, a courtyard, full of garden patches, statues, bee hives, and some mini archer-towers made of wood. Then, you reach the mountain, mostly devoid of the ramps. A drawbridge, lined up perfectly with the wall drawbridge, leading to a wide and statue lined hall, any memorial slabs placed between each statue, starting from the furthest point from the entrance and working it's way to the door. A 3x3 stairway going down multiple z-levels, each level containing a room spanning 47x25, with the stairs being in the middle. Each floor is dedicated to something else: stone and stone block storage, crafters, kilns/wood burners/smelters, etc. Each noble gets on floor dedicated just to him. A massive 25x25x20 z-level tower pops up near the outer wall, with fortifications for archers to shoot out of, only accessible through a hatch in the ground leading to an underground tunnel from nearly the bottom floor. All rooms smoothed, with noble's rooms engraved, the dirt layers except for one floored with stone, the furthest natural wall replaced with stone fortifications. No cavern intersection, no magma unless it comes in through a wall through a ton of pipes. Bedrooms being handled with good dormitories, all chairs, statues, tables, and doors being stone, the drawbridges being made of wood. On a savage plains/grassland/shrubland/anywhere with giant big cats. The entire thing MUST be done in Ironhand or Phoebus tile sets, with multi-level view on.
Bonus points for roofing the entire thing.
Bonus points for having a river run along the outer wall.
Bonus points for doing it with modded in humans.
Bonus points for a roc/cave dragon/dragon hatchery.
Thanks! Hope it's not too big.