An interviewer asks this question to understand how the interviewee as a person seeks to spend their time pursuing their passions and becoming an all-rounder. To answer this question, focus on mentioning specific areas of interest, identifying activities that you like to do and how this helps you grow as a person and as a professional. It is always good to give specific examples of your areas of interest and it is not wrong if you have liked to do or have just started with something, but always good to be specific than generic while answering this behavioral question.