The Fahrenheit scale is, in fact, defined so that water freezes at 32° and boils at 212°. At least, now. Historically, the Fahrenheit scale was defined based on stuff like stable temperature of brine and the typical temperature of the human body, and then it turned out that the water boiling point was around 212°, so they redefined it. So, it's not as arbitrary as it seems at first sight.
And besides, defining zero as the freezing point of water is not logical. Kelvin for the win, where zero actually means zero.
I also have strong opinions on radians versus degrees, 1000 vs 1024 bytes to a kilobyte, and the weird mixture of decimal and sexagesimal that is used when telling time