I don't like living without a/c either...I went to my mother-in-law's once in Tacoma, and they were having unusually warm weather, sultry and sticky until you got by the water...but it's rare enough that very few people, I am told, have a/c...
I tend to be cost driven. I keep the house at 60 most of the time in the winter, and at 85 in the summer. I learned to appreciate the cool living in a town where winter is two months long, with breaks, and have good heat tolerance. They kept nagging me to have one of these devices installed on my central air to interrupt it from time to time to save wear and tear on the power grid, but when they called me to ask why I hadn't signed up to it, I told them I had only run my A/C about 2 weeks that summer.
The guy laughed.
Every now and then I hear about heat waves when the temp gets between 85 and 90 and wonder why people are calling that dangerously hot. I guess it's all what your body is used to.
When I moved to the valley I felt like I couldn't breathe. Funny how a few hundred miles can make a difference. Now the heat and humidity doesn't bother me. As you say...you get used to it.