Research is pointing to conscientiousness as the one-trait-to-rule-them-all in terms of future success, both career-wise and personal.

What is it? Basically, it’s being “efficient, organized, neat, and systematic”:

Conscientiousness is the state of being thorough, careful, or vigilant; it implies a desire to do a task well. Conscientiousness is also one trait of the five-factor model of personality, and is manifested in characteristic behaviors such as being efficient, organized, neat, and systematic. It includes such elements as self-discipline, carefulness, thoroughness, self-organization, deliberation (the tendency to think carefully before acting), and need for achievement.

http://time.com/3136568/science-points-to-the-single-most-valuable-personality-trait/?