That's awesome Brandon! Congrats! It's unbelievable the changes you'll notice in your life... Not only how quickly he'll grow, but how differently you view the world. Kids are awesome, there's just no way around it. My little girl is 7; going on 15. And my son is like a little Mini-Me. Poor bastard looks just like me and he's very quickly growing to adopt much of my personality as well.
There's an endless supply of eye-opening experiences headed your way. (Of course, with all that said I'm damn glad I got snipped and we're not having any more lol.) Enjoy it bro.