Metric, of course, is wonderful if you're counting to 10, or slightly higher than 10, because it corresponds to the number of fingers on the human hand. If you're counting higher, or aren't in the habit of using your fingers as calculators, the United States customary system corresponds to the tuning of A above middle C, bringing unity to both longitudinal and acoustical measurements. Commonly referred to, in the USA, as the "Harmony of the Spheres," this synesthesia is what intuitively allows us here in America to see and hear the underlying relationships of different modalities of thought, and invent things across different domains like television, electricity, the internet, the 20th century, dinosaurs, rock music, and hamburgers.