I'd like to see the device used to measure that "10%."
Patrick offered one piece of sound advice...take time to do research. Go look at cars in person, read all you can, and look at lots and lots of of pics. Over time, what you expect your car to ultimately look like will slowly percolate up to the top. Your priorities will form (body shape, price range, ease of build etc) and then you'll finally pick your car. This is not one of those things you want to rush into, unless you have plenty of disposable income.