I really believe we are what we are ................ I believe that if you have gone through life being a decent, kind, thoughtful human being you don't change. You may lose it once in a while when you are pushed to the limit, but on the whole I think nice people stay nice people.
On the other hand, if you have had to fight and claw your way through life, you can cover that with a slick exterior for a while, but I do believe that sooner or later when things are not going your way, you become the fight and claw person all over again.
I also believe your true character shows on your face. Your facial lines show whether you are always "down in the mouth", or whether you look for the best in life.
I think it also comes through on a chat line in the way one responds to a question posed here.
"What makes people the way they are " ............ the environment in which you are raised. If you are raised in a loving and giving family, rich or poor, I truly believe you stay that way.