I had the thought a year or two ago to ask a mentor of mine, who works in a position that involves frequent interviewing and hiring for various level positions, about the number-one quality that she looks for in applicants.
Her answer was quick and clear: a tolerance for ambiguity. She went on to explain how rare it is that answers are straightforward, next steps are clear, and making decisions is easy. Instead, the people with whom she works need to be not only comfortable with grey areas, but able to flourish within them.
As she described this quality, I found myself both agreeing with its value for all sorts of jobs and circumstances, and determining that it was a quality I wanted to prioritize cultivating.