F is nice b/c it's pretty much on a 0-100 scale. 0 is really cold, 100 is really hot. Anything below 0 or about 100 is pretty much death without proper care.
The corresponding range for C is -50C to +50C which covers virtually all human experience. 20-25C is typical indoor comfortable temperature. And veering from it either above or below makes things uncomfortable. 0C is freezing, below which hypothermia risk increases rapidly.