One of my earliest memories is learning to eat a boiled egg. I must have been about three and we were living in Egypt.
Dad would take the top off the egg and sprinkle a couple of pinches of salt on the side of the plate. It was important to have salt in our diets so I learned to dip my bread soldier in the salt and then into the egg.
Looking back I don't think my mother bothered much with salt in cooking once we returned to the UK when I was twelve. My grandmother, on the other hand, was heavy handed and there would be salt and pepper all over the tablecloth at the end of a meal. Grandpa was never very accurate with his aim so bouts of sneezing were not uncommon 
When I married I added salt to water for boiling potatoes but for some reason we only bothered with the salt and pepper shakers (wedding presents of course) on a Sunday.
Nowadays I rarely add salt to anything due to DH's health issues. I mostly steam or stir fry vegetables and use low sodium stock cubes for casseroles.
I don't understand why TV chefs add so much salt to dishes. James Martin just shrugs and says, 'I'm from Yorkshire,' as though that gives him some kind of immunity from high blood pressure and heart disease. Well, it doesn't!