We got married late, I was 36, my wife was 39. After a couple years, we decided to try. We did try
but to no avail. We thought about fertility treatments but insurance covers testing only, not the actual treatments. We could have spent a boatload of money for nothing. We thought about adopting but that's very expensive up front as well and it doesn't mean you'll wind up with a child, either. So we figured we'd try the old fashioned way and if it didn't happen, then we'd accept that.
Sometimes I still wish we could have had a child. Sometimes I feel better not having a child, seeing how the future looks right now but then I know I'm just being pessimistic, every generation has it's challenges and the future can look bleak or bright, depending on where you're at.
I do know some people who made a conscious choice for no children. I don't see anything wrong with that at all, but they've gotten treated a little odd now and again for it. Isn't everyone supposed to breed?