Full blast is reserved for when first getting in when it is crazy hot or cold, but once it gets to a reasonable temp (or starts at one) then just somewhere in the middle based on whether the sun is on my side or it is humid or something.

Right now I have the temp setting and it is somewhere between 68 and 75 depending on whether it feels hot or cold and I just change it a degree or two until it feels right. Ideal temp just means I feel comfortable, and what I am wearing and the temp I came from changes that. Have little paddle flippers to adjust so easy as a finger flick to adjust and having physical controls for the a/c was a requirement when I bought my car.