Dad-ness

What makes a good Dad?  I know a fellow who was not a good student, does not have much of a job or prospects, a bit of a partier and somewhat stupid sex.  He got a girl pregnant.  No marriage.  Turns out he is a great Dad!  Go figure.  Another fellow did well in a good school, has good job, got married before having a baby, but turns out to be clueless about Dad-ness.  Maybe Dad-ness is passed down from father to son.  I am not sure.  Jesus seems to be at ease around children, but that is not the same thing.  I do know that from what I see in guys who are good Dads, Grace is everywhere.  School diplomas and money sure does not teach it.  Maybe it is a gift?