@corvus @morgant
Disclaimer: Fahrenheit is literally the only Imp unit that makes any sense to me, and only for colloquial/weather use.
To me, it's a simple matter of optimizing the usable space and resolution of the scale.
Also, a large part of it has to do with the weather where I live:
The temperature scale here goes from about 10F/-12C to about 105F/40C most years. Rarely ever any colder or hotter than those two extremes.
That means that a two-digit Fahrenheit temperature covers nearly the entire gamut of temperatures I encounter here.
With Celsius, not only do I have to use a negative sign for a few months out of the year, but more than the entire top half of the 2-digit number range is irrelevant to me.
If you think like an 8-bit programmer (but using decimal), #Fahrenheit just makes more sense.
Now of course, if I lived in Antarctica or Iraq, that would be a different matter.
But simply put, if I were to take the 90th percentile of temperature ranges for the area I live in, and number that zero to 100 for my imaginary temperature scale, that looks a LOT more like Fahrenheit to me than Celsius, and would look more like Fahrenheit for most of the Earth.
P.S., proof of our weather range from over 13 months of weather logging:
Documents $ cat weatherlog* |grep -oE "in $city: [0-9]+" |tr -dc "0-9\n" |sort -n |(head -1; tail -1)
11
104