Education- What does he know? Is he of average intelligence? Is he of low intelligence?
Reaction Time- Can he think on his feet? Can he respond well to different situations?
Different Classes- Did he start off rich? Has he been in poverty before? How did he get out of the situation? How did he live and respond in poverty?
How does he pay attention? What does he pay attention to? What is his philosophy? What are the faults of his philosophy? What are the upsides of his philosophy?
Money Management- Does he save? Does he cut corners?
There is more but that is just off the top of my head.