I am one of those people who has a newer house, an OWB, and whose house is always cold. We keep it around 65° in the winter. There are occasional complaints but neither my wife nor I can handle a warm house. My upper limit is about 70 and then I start opening windows.
Got 3 sisters and 4 brothers grew up in 1.5 bath house.. 3 girls 1 bath, id put in another toilet or outhouse!!
Wouldn't trade any of them.. Love them individually and as a group! My Liz even said last week Good heavens 'Dad needs a man cave!' Granted my MIL and SIL where both up for that week..
I like 67/68ºF but the wood stove gets the living room and kitchen quite a bit warmer when the stove is cranking. I could do the 66º Day/60º night if I had to.