It is easy to see in this context how rounded we are as individuals. We all change in different settings. There are reasons behind every choice we make, and every persona we take up. Another thing to remember when creating characters is stereotypes. Try to avoid prescribing to them at all costs unless you are doing something to experiment with them.
Stereotypes are very damaging to ethnic groups.
Not every married woman is a mother. Not every southern white man is racist. Not every Appalachian is a hillbilly. I had to take these things into consideration recently when I wrote a piece about an Appalachian woman who was accused of murder. I had to be aware of what the reader would think when they read her dialect or about her way of life.