Blueprints are fun. I spent about 4 years studying architecture as a hobby when I was in school.
Also, I've been doing a solo proof-of-concept build for the map idea;I've been creating a fancy KE precinct house. I've got the sublevel 2/3rd done (to include holding cells and interview rooms), the parking garage, the main entrance, and about 40 meters of street and sidewalk, along with a short stretch of unfinished sewer. Only problem is cleaning the snow up every few hours (for some reason it decided to be a snowy superflat world). I've been careful to make ceilings and certain doorways metahuman friendly, while others would force your average troll to duck (i.e. holding cell doorways).