re: Why is the Grandfather-grandson relationship so special?

My paternal grandfather died before I was born, and my dad always said he and I would have been super close because we were exactly alike. I remember we were at a family wedding when I was 19 or 20, and I walked down to the lobby of the hotel in my suit and my dad just froze and said he thought for a minute I was his dad because I looked and walked just like him.