Stellajane and Taz2 make some interesting points and I would add that perhaps hot flushes are the thin end of the wedge. Perhaps the menopause is more about living for with rest of your life with hormone deprivation and even if women don't have hot flushes or night sweats, it does not mean they have got away with it because they may well have other problems later on.
My mother never had hot flushes or night sweat but just noticed that her periods stopped when she reached 51. However, from that age until now, she has never had a full night's sleep, went on to develop high blood pressure, has had two hip replacements, prolapse (could be from having 4 children), bladder problems, aching joints, frozen shoulder (for years) curvature of the spine and her cognative skills have deteriorated. She and my father are the same age but if you stand them next to each other, you can see than age has been kinder to him and he hasn't had any of these problems. Some of her symptoms could be put down to bad luck and the ageing process but there is no doubt that the insomnia, hip replacements, bladder problems, frozen shoulder and spine curvature and all due to oestrogen deprivation.
I haven't had insomnia, hot flushes or night sweats either but I take HRT as a preventative measure and also to keep up my oestrogen levels because if they get too low, I get migraines. I do suffer from (artificial) progesterone intolerance but that's another story!
Whether or not to take HRT is a personal choice but I think the debate must remain open as more and more evidence is emerging in its favour. One leading expert in the field stated "Oestrogen replacement therapy is probably the most important advance in preventative medicine in the Western world for the last half century".