Your interviewer likely has a good grasp on your skills and general experience from your resume and application, so now they want to get to know more about you, your personality, and how well you work with others. Understanding how coworkers perceive you, and how you handle this question, will give them a lot of useful information about how you might integrate into their team. When responding to a question like this, you want to strike a balance between describing your skills as an employee and also your personality. Be authentic in your response, because interviewers will likely ask a similar question to your references.