personality is locked in at birth, trust me bro watched a doc once

The most fascinating documentary I’ve ever seen is called The Up Series.
It followed the lives of a group of 7-year-olds - and filmed them at age 7, 14, 21, 28, 35, 42, 49, 56, and 63.
Biggest takeaway:
Who you are at 7 is likely who you are at 63.