I have no thermostats. Just a swamp cooler that runs on high constantly in the summer (spring, and fall), and a free-standing heater thing that you can adjust from low to high for the winter.
Our home is geared toward energy efficiency so a series of dampers allow the home to be split into 5 separate zones, each of which are independant of the other and themselves divide into 4 time slots. For the less used guest areas we’re pretty frugal with the allocation. For the normal gathering areas we set them according to predicted traffic.
Here in the south, it’s a rareity that we ever need to turn on the heat in winter. We have twin paned windows, 6 (twice normal) layers of stucco, radient barrier in attic, 50% more insulation than recommended, etc. It doesn’t give up the heat or cool very easily.
In the summer, I keep the AC around 79. In the winter, I keep the heat around 62. Anything in that range can be made comfortable by adding or removing clothing.
I live in Arizona. Yes, that state that experiences nights of over a 100°. We don’t typically set the heat on during the winter, though on particularly cold nights we might. Otherwise we have the thermostat set to 75-76°. At night I’ll sometimes set it to 74° because I have trouble falling asleep if it’s too warm.
We don’t have AC; I basically turn the furnace off in summer. This summer has been weird, though, and we’ve had the furnace on much more than usual. We have it set for 68ºF in winter, though, and colder at night and when we’re gone in the day. Actually, that’s most of the time, so I change my answer to 66ºF. Our house is colder than most other people’s seem to be, but we like it that way. We can’t sleep in a hot house (summer and hotel rooms are hard on us).