The following statement is exactly how I, too, approach design. However, I AM dangerous with a scale...as I did originally study architecture and technical drafting!
"It is only my eye that has helped me. I am still hopeless with that thing called a scale ruler. I love color, but that comes very naturally to me. From the beginning, I never followed trends. If I was aware of them, I didn't care, for I believed as I do now, that rooms should be timeless and very personal. I don't set out to achieve a particular style. And I certainly don't have a 'look' -- just a mishmash of everything that somehow, by instinct, usually turns out to be a warm imaginative, 'living room'."
Visit the website of Sister Parrish Design here: http://www.sisterparishdesign.com/index2.php
I transitioned from designing and engineering windows to dressing them! I much prefer the creative (yet still quite technical) side to the strictly technical side!