How does some of the finhes family traits affect a choice(s) that one or more of the characters make?
Scout's behavior in the episode where a clan of people confront Atticus outside the jailhouse the night before Tom Robinson's trial begins. Scout runs to her father and turns to the mob, picking out one man and dealing with him on a personal level.
This seems in keeping with family values - deal with every individual as an individual, not as part of a group, not as the figment of a stereotype, etc.
Atticus's belief that all men are created equal--black or white--leads him to defend Tom Robinson, even though he knows his decision may bring trouble to his family. Atticus tells his brother Jack that he had no choice: Judge Taylor had appointed him to the case, telling him "You're It"; but the real reason Atticus accepted was because he knew he wouldn't be able to look his children in the eye if he didn't.
One trait of the Finch family is to be concerned with fairness and justice. Thus Atticus chooses to defend Tom Robinson, and Jem is astonished to the point of tears when Robinson is convicted. The Finches also seem far more willing to show other people respect than is true of many people in the town. Thus Atticus and the children both respect Calpurnia, and Scout shows affection for Dill, whom others might ridicule.
It seems like a Finch family trait is to do what you think is right no matter what others think. This can be seen in Scout's interaction with her teacher. She tries to stand up for what she thinks is right even if it gets her in trouble with her teacher.