It is indeed the lamest question ever.

The funny thing is that if you ask someone (as both interviewer and interviewee), "In 6 months, what will I love about working with you? And what will I hate about working with you?" you will get actually useful responses that approach the honest intent of the question.

(And by the way: My new boss once answered the latter question, "You won't hate anything about working with me!" -- and he turned out to be the biggest asshat ever. It's just one data point, but my conclusion is that anyone who thinks he does nothing annoying is to be avoided.)