Employers often start an interview that way. Depends on what job you are applying for how you would answer that.
When making friends you can talk about specifics like a book you are reading or a movie you have seen.
Usually people don't want to know your deep dark secrets or your philosophy on life, they want to see how your social skills are and how well you can get along with people and handle stress without stressing out.
What works well for you to answer this question.