69F (aw yeah) in the winter, 73-74F in the summer.
With my ecobee, I have heating setup with a 1F overheat and 1.5F threshold, so the temperature bounces between 67.5-70F, which is comfortable for me and reduces cycling.
Cooling is setup with a 1F threshold, so with the thermostat set to 73F, it will kick on at 74F, which also reduces cycling and improves humidity control a bit.
Having the dual sensors is totally worth it - setting the thermostat to use the main sensor as well as the sensor I have in the hallway upstairs (single-zone, and return ducts are only in the bedrooms), the temperature throughout the home feels more even. The upstairs isn't more than 1-1.5F warmer/cooler than the downstairs in the summer/winter, respectively.