How would you build your home?

I plan on building my home, after I buy property. There is time between now and then, so I have been dreaming up ideas.. I am attracted to cob and circular structures. Most of the time, I dream of the home as conservative, practical, and smart with energy. The home is warm, cozy, familiar, and convenient. Of course, with this home there are views, gardens, and loved ones. Big windows too, to let in all the light.