The qualities NASA looks for in prospective astronauts are "pretty much what you'd expect from any individuals whose job it is to work very closely in very risky environments, and isolated environments," said Jamie Barrett, another psychologist at Wyle on the astronaut selection panel.

This means a person who would make a "good neighbor" — someone who's easygoing and has good social skills, Barrett told Live Science. A good candidate is also very resilient, she added. 

https://www.space.com/26799-nasa-astronauts-psychological-evaluation.html