As John rightly points out this could be divided into categories; such as the bragging ones, that usually cost money to achieve, the really personal ones that we can't really share on a public forum, or like the ones that have cost us virtually nothing (financially). They do say the best things in life are free! In this category, the ones that come to mind at this moment, I would put at;-
(1) Hearing my mom calling me by my pet name, "sunshine".
(2) seeing my daughters dancing, during the "Beatles" revival in the 70S, to a Beatles medley, in mini skirt that was also back at that time. That was like a time warp.
(3) Climbing out of the Wye Vally in thick freezing mist, on my bike, into lovely hot sunshine.
(4) Seeing my grand son grow up to become a strong young man of 14, after the doctor's had given him up for dead at birth.
(5) Getting through life, making a success of it and ending up with a wonderful loving family.
Some of my bragging ones would normally cost a lot of money but I managed to get quite a few in at little or no cost;-
(1) The feeling you get when standing in front of 100 000 people on that winners podium, as world champ, with your mom in your arms.
(2) Sailing the Irish Sea solo at the age of 11 (i thinks not possible now with all the regulations and insurance ETC).
(3) Doing a full aerobatic programme in a R.A.F. DH Chipmunk, in glorious sunshine high above the clouds, at the age of 14.
(4) Putting that plane safely on the ground in dense cloud, after clipping the hedge just before the runway.
(5) At the age of 17 winning the first cycle race I took part in, against all comers without any equipment or racing clothes, "YES!" I screamed, I have arrived and never looked back.
These are really the ones that stick out in my mind, at this moment in time, and may not be in the right order. I have climbed mountains, seen ancient monuments and all those things that tourist can experience, a a price. I think that Jacqueline has got it right with her down-to-earth approach.