This is your chance to shine. You're being asked to explain why you are a great employee, so don't hold back and stay do stay positive. You could be someone who thrives under pressure, a great motivator, an amazing problem solver or someone with extraordinary attention to detail. If your greatest strength, however, is to drink anyone under the table or get a top score on Mario Kart, keep it to yourself. The interviewer is looking for work-related strengths.