**note : English is NOT my first language. my answer is not any sort of essay
Family is important for shaping a person's personality, for example they will shape the way I talk. If i heard them talking politely to each other, I will too. If i heard them disrespecting each other, I will do this with other people, they will shape whether i will be a polite or a rude speaker. I will also get affected by the way the treat each other, If one or more members were abusive, I will grow up having a wrong view about relationships, I will always be afraid to get involved in any sort of relationships whether it's a friendship, marriage etc... But if they were decent and treated each other respectfully, i will treat other and myself as they did. The way they treat me is an important factor too, If they treated me harshly or irresponsibly I may get a trauma from the way i was treated, the way they treat me is the same I will treat others with.