Those things are building your personality, bad or good kind are comes from all factors above. So, that is why you have similar character with your mom, dad, or grandmom/grandpa. And have same habbit/hobby with your bro or sis, or your aunt/uncle.

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I agree with you Spiral. but I add only that the idea of personality is complex. The etymology makes it possible to better apprehend the direction of them: Persona, Latin term derived from the Etruscan, indicates the mask of Greek ancient theatre, which was the interface between the actor, his role, and the public. The knowledge of the personality is often an important stake in what it makes it possible to provide with a limited margin of error the behavior of the person in ordinary situations, for example professional. It is also the objective of the self-knowledge.
Thank you for this subject Spiral.It's interesting. I believe that it's this kind of subject which the forum with need ,i.e. an educational and informative subject.