The person who returns from living abroad isn't the same person who left originally... Your outlook changes. You don't take things for granted that you used to. For instance, I noticed in New York that when one cab cut off another, the driver who got cut off would always yell at the other driver... and I realized this was because Americans assume that the other person intended to do what he did, so they want to teach the person a lesson. But you know, in Japan, people almost never get upset in those situations. Japanese look at other people's mistakes more as something arbitrary, like the weather, I think, not so much as something to get angry about.