I am a furniture maker/designer by day and designed and built the entire house myself with help from my wife and family. The focus of the design was in keeping the layout open and airy but also creating separate feeling spaces.
We have lived in the house for 8 months and absolutely love it, I never want to live in a bigger house. That said we are selling the house in order to buy a piece of land and build a 120sq ft house!
More info. here.