The units you choose to measure distance, volume etc in are fairly arbitrary. One system is no more accurate than another. However, I think it's fair to say that Metric is more intuitive than Imperial. Imperial is a mixture of number bases, whereas Metric is pure base-10 (which has less to do with the number of fingers or toes and more to do with the fact that we have 10 unique digits in our counting system). The only property that cannot be "Metricised" (if there's such a word) is time. The time for the Earth to revolve around the Sun isn't a nice, convenient multiple of 10. Bugger! Just my 2p worth (for what it's worth).