Nutcase is a perfect example of a font that principally designed itself.
It is based on a hexagonal template with the the centre removed to increase the decorative element. The concept translated into a complete alphabet, so the idea was expanded to included both upper and lower cases.

It wasn’t all straight forward though, avoiding awkward characters and retaining legibility took a little perseverance but it eventually paid off.
This is primarily a decorative display face, but it reads surprisingly well as body copy too.