It's chocolate! This idiotic question is defended by people who love the idea that an interviewer should be able to get inside the applicant’s mind and understand his or her greatest failings. That’s insulting. It’s none of your business what a person believes his or her weaknesses are. Are you planning too share your own personal weaknesses, too? If not, why do you presume to ask the question? I don’t believe that people have weaknesses, anyway. The idea of weaknesses comes down to us from our Puritan forebears. You don’t have any weaknesses — you came down to the planet perfectly equipped to do your work here!