No Extroverts on Mars, Please.
“Bell said that usually extroverts are good on teams because their tendency to speak up and engage with others makes planning easier. She added that because extroverts are outgoing, they know more about their teammates — their strengths and weaknesses. That helps team coordination.
However, the unique properties of long-haul, confined missions add new elements to that usual dynamic.”
Basically, if you talk to much, in a small space, people are gonna wanna kill you. And since I’ve gotten yelled at for talking to people in an elevator, this may just be the end of my dreams of interstellar travel.
Getting the Hang of Thursdays 
But, who will trip and be eaten by the Martian sand monster if there isn’t a loud-mouth extrovert in the cast?
In fiction, you always need that guy, so why not in reality…