As a father of 2, my experience was, 0-2 is sleep deprivation; 3-9 is just the tops of the tops - you the man, or woman, in their lives; 10-18 is the challenge of balancing what the kids want and the outside world with the relationship you have built up to that point. Good cop, bad cop, friend or parent, it all gets muddled. 18-24 is where it all comes together for better or worse. In my case, it was better, but I've watched it go south with some of my kids' friends. Best of luck to all of you who are parents. Certainly puts baseball in perspective.