The problem with people's claims for how and when their heating comes on and off etc is that we have no information about how big and how well insulated their home is or how exposed it is to the weather.
If you live on a small modern highly insulated home, possibly mid terrace and facing south then the heating is going to be coming on much later and much less than if you have a stone walled detached house in an exposed position on a northen hillside.
Frankly, I can see no reason to attach special credit to those who manage without heating or are happier when the temperture is lower. From my experience, how much we feel the cold has very little to do with fortitude or experience and much more to do with genes.
My childhood predated domestic central heating, as, of course, did my mother's, but my mother, her sister, one of sisters and I are all what we describe as 'chilly mortals'; people who feel the cold and need to keep warm. My other sister, like my DH and my children will go out into snow with T shirts on.
How far the fact that our normal body temperature is on the low side plays to this I do not know. We were always told that standard body temperature was around 37C. For most of my family, including me, it is around 36C. I am also prone to hypothermia and prefer to keep warm with extra clothes ratherthan extra heating.
It must be nice and economical to manage without heating your house, but it is a accident of genes rather than a proud sign of fortitude.