I'm glad it was useful, @DoTheHotStuff! I had never planned to have children, DP wasn't interested either, and then in our very late thirties, we had a conversation and decided (mostly out of curiosity, I will admit!) to try to conceive, but we were entirely OK with the fact that, given my age, it might never happen at all, and felt sure we would continue to be happy without a child. I conceived, to both of our total shock, the first month. 
But it is entirely true that nothing I had ever read, heard or seen about parenthood in any way approximates my experience of it. Which makes sense I am the sum of my own experiences, and I have my own individual child, and my own individual marriage, career etc so there's no generic way of being a parent, any more than there is a generic experience of being married, or having a parent, or being a person of whatever nationality or sex.
I'm delighted I had DS, who is fabulous, but I feel sure we would have continued to be happy without having him, and that the good life without children we had for over 20 years of adulthood would have continued good. I certainly never felt my monochrome life exploded into technicolour or anything.
I'll tell you one thing, though having a child is a hell of a lot more interesting from the inside than it looks from the outside, in my experience. What is visible is the gruntwork nappies, homework, school pick ups -- but the actual experience of having made and raising a person, even when it's hard, is terribly interesting. I don't think people say that enough, perhaps. I think I had a child to see if it was interesting. Luckily, it was...
Good luck with your decision, whatever you decide.