My dad hasn't passed yet, still farting around in his mid 80s. Probably in better shape and health than I am.
I miss the most is how people and my family used to respect him. Before my accident, I was pretty much the only family contact he had, going over to his house and fixing his computer, or adjusting his TV and picking stuff up for him from the store since he can't drive anymore.
My oldest sister didn't even invite him to her wedding, which is something I haven't really gotten over, to when he was at my middle sisters wedding and the whole family patronized him.
To be fair he's getting a little crazy, but he's still your dad. He's still family. The one thing he instilled in me is that family should always be there for you, and will do anything for you. This went over well with my best friend and his full blodded Italian family lol.
I guess I just miss people being able to look at him like a person instead of a crazy old man.