How is personality developed?
My answer: I believe it is through nature and nurture.
Genetics because a good deal of who you are comes from the DNA of both parents. I believe it is already encoded in the way we are suppose to be. Then with the environment because what you live with everyday--family influences as well as friends and even strangers who pass through your life--can influence your thinking.
Good answer. :-)
Personality is also developed by the interests you pursue and the challenges you successfully face.