For me, it came down to Map Vandal's old-style dungeon/mine and Jaxilon's nifty fortress-at-sea. tilt's map was clever and has some nice features, but it would be a little hard to use and wasn't quite so nice to look at as the two I ended up choosing between.

Rulma's Ruby Mine includes a Waste Disposal Area. The Aquatic Fortress lacks a head and the deck design means you can do your business over the side, it'd just land on the ship. So, for reasons of sanitation, I voted for Map Vandal.