I've been grinding away at my dream home for quite a while now. Some of my
house pics can be seen on the homepage. Mine evolved a lot on paper like yours Spark but we finally settled on the basic design by putting our actual limitations and must haves into the equation. We were limited to what I could actually build at the time. That forced me to keep my timber frame simple enough that I could do all the joinery. Since we wanted a small house with a central Russian fireplace, our design was limited there. I'm still sketching my sunroom etc... to build after I finish my degree so I'm not sure the project will end. If you're still at the land buying stage though, why not let your imagination run wild?
Good luck it's great fun.