There's 22 years between Willie and I
In some ways it is really obvious -he has a son my age, and my DSD is only 12 years younger than I am.
He isn't very hands on as a dad, but that's his personality not his age, in fact he is more hands on with our four than he was with his older kids, I think coz he appreciates fatherhood more now that he has had time to grow into it.
I don't really think about the age gap much, except when I'm doing stuff like filling in forms and I remember that he was born in the 1950's and I was born in the 1980's
Oh and like Fattarts said, he doesn't tag along when I take the girls to birthday parties etc. but again, this is mostly just his personality rather than his age.