I used to think that the way people act as adults was entirely based on childhood and how they were treated by parents and others. Like obviously things would be different based on genetics and brain chemistry and stuff, but I figured it was mostly reactionary. My twins taught me I had a pretty skewed view of it.
From the word go, both boys were so different! The way they liked to be held, how friendly they were with new people, the toys and bouncers they preferred. I thought they'd both like the same foods since they shared every meal together since birth, but at almost two years old most nights I have to make them two different dinners. One is more neat and gravitates towards puzzles and blocks, the other wants toys that have a lot of motion or music. When we watch TV, one likes to snuggle while the other would rather have his space. One lays down easier while the other fusses before going to sleep. They've had as equal parental treatment as we could give, but they're still such different people at an age where I thought all kids would basically be blank slates.
I guess I'm saying I'm surprised there's more nuance to people than I expected. Anyone else have a similar experience?