The size of the 'degrees' on the F scale is smaller, or at least some of the time, this does not make it more suited to every day weather measurements. Can you really tell a +/- 1 degree C difference? I suspect the answer is 'no', no matter how much you might say that you can. Because both C and F have a higher 'resolution' than the sensitivity of our bodies it really does not matter from that perspective which scale you use. So that addresses your first paragraph.
Well, yes it is just a set of numbers. But, it is much more accurate than you say.. the scale is now defined in a different way. Personally I'd say that C is a better system . I'd prefer it to be based on some non physical parameters but *shrug*.
With imperial measurements.. It does not make sense to keep varying how many of your first level (ie, inches, pounds, pints) go into your second level (feet, stone, gallons). Sticking with only 12/14/16 would be fine, but the imperial system does not do that.. it is internally inconsistent. The metric system on the other hand.. 1000 nanometres in a micrometre, 1000 mm in a metre, 1000 metres in a kilometre. Note that I've used 10^-9, 10^-6, 10^-3, the base unit (metre) and 10^3. Cm is just a factor of 10 greater (ie, it is 10^-2) for simplicity of daily use. The differences are all 10 or multiples of 10. Much more sense!
One of the rare inventions coming out of France which makes sense... that and the guillotine..
Now! The topic!
I prefer 15-20 C. If it gets above that I sweat and I hate it. Below that is fine.