Although your first instinct might be to start by describing your interests and hobbies, remember where you are. You are in a job interview with the sole purpose of being hired. The information that you should detail when asked this question is to begin by describing yourself in a work situation. Prepare a summary of your work experience as well as your career achievements. Briefly detail your education accomplishments as well as any other accomplishment or transferrable skills that are relevant to the job vacancy. Only once you have discussed information that is specific to the available position, should you then give a short explanation about your interests and character traits.