I miss those "debates" I had with mine.... lol. The point I got to with it was.... it's life circle, and we have to all deal with it at some time, sooner or later. I still think of things I wished I would have asked my parents, said to my parents or done with them. There is never "enough" time, but appreciate those we did have. We did a lot. Our kids will have face this at some point as well.
However, who I was closest too was my mother and grandfather. I lived with him for a time, and spent all the time I could with him. He taught me how to shoot, hunt and fish, work on & fix things, etc. We did all of them, all of the time. He died when I was 16 yrs old.
Keep the memories alive. It's good that you have them.