Again, as responded to a separate (related comment): Sorry, I should have said: besides your competence, your enthusiasm is your most valuable asset. In more

Again, as responded to a separate (related comment): Sorry, I should have said: besides your competence, your enthusiasm is your most valuable asset. In more detail: assuming all other things equal, an employee who wants to be where he or she is will be more valuable than an employee who is bored. You have had your entire interview to demonstrate your competence. Assuming you have done so, when you're down to the final softball question, enthusiasm matters. Assuming you have not done so, no answer to this question is going to get you hired.