What's so easy to miss is the immense feeling of love, of being needed, of being loved, that words can't describe. I frequently tell people I feel like the grinch after he discovers Xmas - my heart is three times bigger. But you can't really see that it's just a feeling I carry with me.

However, even though I also think nothing comes even close to parenthood for me, my perspective is that society strongly encourages —I'd even say strongly pressures— people to have kids, to feel that if you don't, it's almost like something is wrong with you. Maybe we're just different generations? :-)

That’s…unhealthy and unusual.

I completely agree with you. But I can't say around me, people, movies, society ever sent the message that parenthood is terrible. The way I interpret the message was always "this was hard, this was grueling, but I wouldn't change it for the world". I didn't get this apparent contradiction until it was my turn.

I think the people who miss almost all of these "tickboxes" and can somehow link it to the kids become unhappy with parenthood. If they ever feel their personal time, romance, career, success suffered because of the focus on the children, they will end up in the "disappointment" camp.

I never personally met anyone who was willing to admit regret of having children but I did meet people who were disappointed and put a veiled blame for their failure on the children.