I absolutely remember how great it was pre-kids to be able to pick up and do whatever whenever. I never understand people who are all "I can't even remember what life was before them!" I do and it was kickass. Impromptu weekend road trip? Last-minute happy hour with coworkers? Check and check. My oldest was a NICU baby and was so incredibly high-maintenance that I hated maternity leave. All he did was scream and nurse. I was afraid to leave the house with him. I didn't go out to eat for dinner for 6-8 months after he was born because I knew I would pay later if he didn't get to bed by 6:30 pm. I could not WAIT to go back to work. To be perfectly honest, then, in the bowels of motherhood, I wondered what on earth inspired us to try to get pregnant. I had never really been around kids and thought that some latent maternal instinct would kick in. Eventually, after MANY months, it did, but in the darkest days I worried if I'd made a huge mistake.
Point is, people can fuck right off with their opinions. If you're cruising along childless and loving life, I'm certainly not going to tell you you need kids to be fulfilled or whatever. I have two kids and I would lie, cheat, steal, and murder for them, no questions asked. They bring untold joy to me and I never regretted the decision to bring children into my life. But I think it's so intelligent to really think about how children can affect your life, and how ok you will be once you realize that parenting consumes all of you, in ways you probably don't understand yet.
More than almost anything else, parenting asks everything of you and asks you to just go with it, blindly, believing that it gets easier and one day you can be you again. This was probably the biggest thing for me to get used to. I'm a control freak, and there's nothing like pregnancy and babies to really bring home that there are things you may never be able to affect, no matter what you do. This lesson hit home when I had a miscarriage between my two boys. I couldn't have done anything about it, and yet, 8 years later, every now and then I'll think about that baby and what it could have become, and I think maybe if there's an afterlife I'll get to meet it and see what made it so special that it was called back at 8 weeks gestation.
If we have auras, I think mine would be a bit dimmer than it was before then, before that baby left us and before my post-partum depression decided to stick around permanently. For all that, though I wouldn't go back and do it over differently. Because of lessons learned while raising children, I've become a more patient, empathetic person. I'm less uptight than I was, both at home and work, because after you have a baby that screams the first year of its life and after losing the next one, you realize that you can only do so much, and focus on things you may be able to affect instead of things you won't.
These are lessons most everyone learns at some point. Sometimes you learn them on the childfree track, and sometimes you learn along with your kids as you raise them. Both ways are great, but both is not for everyone. Godspeed, childfree friends.