I have a daughter and enjoyed watching her grow up but did not enjoy wiping up her vomit, you're sick. I'd trade the sleepless nights and vomit for the gold.
This is a topic I think about quite a bit. I feel no need whatsoever to produce a child of my own. Never have. I am 30 years old now. A child of my own is not the missing piece of the puzzle that will somehow magically complete or "light up" my life. I feel there are simply too many people in this world. And sometimes I think it is selfish and egotistical of others to look at their kids and say, "Awwwwww look, a tiny version of me." Almost anyone can produce a child. It's nothing special and it's not a miracle. In fact, statistically, the ones that are most likely to reproduce are those without a college degree. And no, I am not saying that if you didn't graduate from a university you are not intelligent. Intelligence and education level aren't necessarily the same thing.
I see what the poster of this topic was trying to say, but it came off as somewhat obnoxious. I disagreed with him when he got into the selfish, materialist/ financial reasons for not having a kid. That just makes this guy sound like the world's most self-absorbed yuppie. And certainly his point about all kids being brats is ridiculous.
But as I looked through the responses to his post I saw something just as disturbing. Some parents stated that their children are the only reason why they carry on in life. But if your children are the only reason why you carry on in life, then maybe you should seek out hobbies that are of interest to you. Something that makes you happy. I have nothing against parenthood, but if that is all you talk about at work and in social your social life, then perhaps it might be good for your own mental health to find another outlet of happiness rather than living through your children. Being a mother or father should never really define who you are as a person. Your own identity as an individual and your identity as a parent should be two very different things.