I never knew John, or interacted with him here, but judging from the posts I see, he was a very good man and will be sadly missed. Being a cat lover myself, Im sure we would have gotten along well. It is always hard to see someone go. Rest in Peace John.
I agree, I am now older than my grandfather was when he passed away suddenly of a heart attack in his 50s. Being on high blood pressure meds myself, its kinda scary.