> When I walk outside unless it's really cold I don't ever think about what temperature water freezes or boils, I want to know whether I am going to sweat, whether I'm in California, or whether I'm going to freeze my butt off when it's 14 degrees out.

In either system that's just a matter of remembering a few numbers. And it anyway doesn't give the full picture since humidity and wind speed play a huge role in how it actually feels like and what clothing one should wear.