In the fast paced world in software and technology development, heavy work loads and potential on-call duties have created a lot of burnout in professionals. Your interviewer is looking to hear that you are cognizant of the risks of burnout and that you do what is necessary to maintain your own personal health and well being and that of your family as well. While you can use this time to talk about personal interests or hobbies outside of work, try to focus on how these items help keep you refreshed for the work that you'll be doing for Digital Ocean.