What do you feel is the most important skill that an Analytical Chemist should possess and why?

There are many important aspects of the Analytical Chemist position. The interviewer is looking for you to talk about what skill you feel is most valuable to the role. Maybe you feel that having a strong chemical compound background is important, maybe you utilize specific research methods in your role. Talk about the skill that you feel adds the most value to the role and provide reasoning as to why you feel that this particular skill is so important.