@spidergal,
My 2 cents would be to look at:
1. physical attributes - athletic, strength, beauty, ugly, fat, slow,uncoordinated, agility
2. mental attributes - smart, stupid, quick to learn, analytic, good long memory, bad short term memory, poor memory
3. station in life - born to rich society, poor society, professionals, beggars
4. training and upbringing - professional skills, etiquette, ethics
5. social upbringing - in a Viking settlement it is okay to pillage and rape women
6. self control - is the person spontaneous, cool headed, calculating
7. personal behavior - blabber mouth, taciturn
8. ambition - end game i.e what are the person's goal - to be filthy rich, to enjoy life, to see the world, to be loved by all, to make society a better place, to bring law and order to the world, etc.
All these these factors will help determine a person's behavior and the route he takes to achieve his/her end goal. It changes with his/her age and status. The mores are the society standards one grows up with be it religious or ethnic. The family might have a great influence on motivation with the father or mother being the motivator for moral guidance. Peer pressure and celebrity or sports figures, military or professional heroes may also provide as an idol for a young impressionable teen. You have to check his her background to see what motivates a person and what the goals are. If there was a war and his/her parents were murdered it can be easily deduced that he/she would seek revenge thus the conflicts in the Balkans.