My father died just short of 91 even though he smoked and drank to excess most of his life. My mother passed at 73 as a result of a brain tumour. I am now past 83, next birthday in June. My paternal grandmother was 87. Another relative on my fathers side (unknown to me) was 105. I have definitely slowed down since hitting my 80's but it seems I might have a while to go yet.
Jim