Do seniors feel that preserving their legacy is important?

I'm thinking about building a site to allow people to preserve their legacy and I was wondering, do seniors feel that it's necessary to preserve their legacy for future generations? Do you have more that you'd like to share with your children/grandchildren that you feel they don't know?

And on the flip side, do you, as someone with elderly parents/grandparents, feel that you'd like to know more about them?