Man, before I had my son, I was a total wreck. Stressed out with work, my marriage was going nowhere, and I think I was "officially" depressed - you know, at the point of medication.
Then I find out we're pregnant and I became REALLY stressed out. "How am I going to deal with this?" "Will I find a decent daycare?" "Can I afford this?" The worries went on and on.
Boy, I tell you what, having him was the BEST thing I ever did. I don't worry about work anymore - I leave it there. I don't stress out over the little things cuz I only have one thing to worry about - a 35 lb turkey who loves tractors and Bacca (2 year old slang for Chewbacca)

And my marriage is a whole lot better! We don't fight anymore (rarely, I should say) and we spend more time together because of him.
I come home from work and he's there to give me a hug - sure makes the ****** day at work go away real quick. Breaks my heart when he comes up to me and says "Watch Bacca?" (means he wants to watch Star Wars).
It's really cool to have a son who likes Star Wars and wants to play together with my toys!
Yeah, it's a lot of work, hell, he threw up on me Saturday night - pizza all over the place. And yes, I cleaned it up and it didn't bother me at all. What did bother me was the fact that my wife was out on the town that night while I was home with a sick kid...

You know what though, I'd rather be home taking care of him than be anywhere else in the world - no doubt about it.