This question is there to see if you describe yourself as a positive person or not. Always answer these types of questions with more than a 'Yes'. Go into a short detail of why you are happy, what makes you happy, and how that will translate into this job. Example: 'Yes, I love my family, friends, and school. I am really excited about this opportunity to work at Jamba Juice, and am thrilled at the opportunity ahead if I am hired.'