Open Floor Plan
These castles would likely not make a mark on House Hunters. The people who lived in the mansions, unless they were royalty, had pretty much zero privacy. Call it an "open-floor concept" because you were probably sharing one room with several other people. What an annoying way to bond...
Crowded Halls
If you imagine hallways in mansions to be big and spacious, you would be correct by today's standards. However, back in the day, it wasn't uncommon to fill up hallways with pretty much anything you could find. Not only that, but over 100 people lived inside. Make way!