After my grandfather's death I learned from his brothers that he led a fascinating life but sadly, I never thought to ask him about who he was before we were around.

Aw Carly! That's made a bit emotional. Ignoring that niggling feeling of 'must call nanny/grandad' is terrible, but we all do it. Making an effort is the most important thing with family, I bet he's smiling down on you though :)