For those asking for a defintion of the intangible benefits, you know that everyday ordinary guy in the movies, who suddenly becomes an all out super hero when his family is threatened? That's what having kids does to you. Inside you're that guy all the time because you are responsible for these people you love. You would do anything for them. You won't understand the depth of how this feels and how it changes you until you live it.
I'd also recommend reading dcasper's
Post if your wife is pregnant thread.
The Poker Mom