For me it would depend on when you asked me. I had my first at 24 years old. I was happily married and excited to become a mom. Giving birth to my son started the hardest years of my life. I ended up with severe postpartum depression. I hated everything, I wanted to get up and walk away from my life more than I can articulate into words. I loved my son very much, but I didn't want the life that came with it. We had always planned on having two, and when he was about 14 months old, once I started to feel a little better, we tried for #2 (despite knowing we had an 80% chance of my PPD returning when she was born). Our daughter was born when I was 26 and my PPD returned halfway through my pregnancy (at that stage it's actually called antenatal depression, but that's not important). But this time, it was MUCH worse. I was suicidal. I wanted to hurt myself, and the kids. I hated my life. I won't elaborate too much more on that, as this forum is full of dudebros that seem to have little sympathy in situations like this, but it was brutal. My husband literally carried our family. However, I was getting a lot of professional and medical help. Eventually, it got better. I liked my kids, I enjoyed being a family, and being a mom was something I was connecting with more and more every day. I officially hit remission from depression in June of 2016. My son was 7 and my daughter was 5.
Now I love my life. I know, it sounds so cheesy. 7 years ago, I regretted it with every fiber of my body. Now I wouldn't change a single damn day. Even the shitty parts. We're exhausted most of the time and financially we're just getting by, every day seems to bring a new challenge, but I freaking love it. Definitely no regrets at all. Waiting until we were older probably wouldn't have changed anything, except maybe we'd have more money. Meh. And now I'll be 44 when my youngest graduates high school. That sounds pretty good to me
That being said, I have several friends who don't want kids. I would never try to convince them otherwise. I fully believe it is not something everyone should do or could do. It's a ridiculous sacrifice to have kids, for the rest of your life. I agree with the poster above that being a parent is something you should be passionate about. That's not to say unplanned parents can't become passionate, but if given the choice to have kids, it should never happen just because society says you should. Definitely follow your heart and/or your gut on that one.