Here's a completely random anecdote: my mother often told me that her father, my grandfather, born in France in 1899, sculptor, draftsman and general maker of things, had a strong dislike of the metric system. He complained continuously that anything with round metric ratios was "ugly" and that beauty could only be found in more ancient measuring systems.

He died when I was 4 so it's not a first hand account, I'm not sure how much of it is true or what he really thought, but somehow it feels right.

The metric system is incredibly useful and practical (of course) but there's something rigid and unpleasant about it.