Jeff Cooper wrote a book about general personal security, and within it he had a layout for his ideal home. I gasped when I saw it, for it was the exact layout I had designed for my ideal home. My wife thought I was crazy because I ran into the bedroom to show her the image from his book.

Homes should be build like castles but without actually looking like one. You can still design a home without having blind spots for example. Homes can still be built with physical defense in mind without making them look like prisons too.

It can be done. I know you were joking about a moat too, but a mountain top cabin of mine will have a dry moat. You don't need water if you have concrete and fencing! :)