47 years old, single and child free by choice. I knew from around the age of 12 I didn't want children, and have zero regrets, other than being unable to find a partner who didn't want or have children (yet!).
I grew up in a large extended family, and as virtually the only girl was expected to babysit my brother and cousins. I found that children are, on the most part, annoying, dirty, repetitive, destructive and exhausting (they can also be cute and funny occasionally). Plus, my mother and her mother were definitely not maternal, so I never felt like I wanted to bring a child in to this world on the off chance some mysterious maternal glow would kick in.
My brother has three of his own, and is stepdad to another three, and loves it. I always joke he got my maternal genes. Frankly, I don't even really enjoy spending time with them either, and am always glad to get back to my tidy, quiet little flat. I have dated guys with kids - one had a teenager who barely spoke and did his own thing, the other had two younger boys he saw regularly but acknowledged to me he found it boring. Most of my friends have kids, one who has three loves it, but another - who tried for years to conceive - has said that while she adores her son it has been much more challenging for her than she ever thought it would be, and has impacted greatly on her life and relationship with her husband.
I never really had any negative reactions to being child free, most people were curious but they don't even ask now I'm a bit older. I think I'm essentially pretty selfish, and that's why I am on the path to FIRE - it enables me to do what the fuck I want, when I want. I enjoy sleeping, and reading, and Yoga, and travelling on my own and with friends. I like spending money on books or eating out sometimes or saving it all. I have some regrets but not having kids is definitely not one of them.