This question is a more informal and fun way to get you to relax, and share more of your personality and what you feel makes you unique. It also offers an opportunity for a candidate to showcase that they have a solid work-life balance. Considering how stressful many public works jobs can be, there is a higher likelihood of employees burning out on the job, leading to further turnover. So, your interviewer may also be grateful for some peace of mind if you seem more balanced and less likely to burn out on the job or to bring your personal issues to work with you. So have fun with this question. Make yourself more relatable. The more relatable, emotionally stable, and well-balanced you seem to your interviewer, the more likely they'll consider you a good fit for their teams.