I purchased and listened to the interviewing series of podcasts, and found it to be terrific. It helped me to get a few offers, and I accepted one at a much more prestigious firm than my current one. The podcasts were well worth the price, and I'm going to be getting an annual salary boost 100 times the cost of the series. Thank you Mark and Mike.
I don't remember this being covered in the series, so I thought I'd pass on a response to the "Where do you want to be in 5 years" question.
One of the natural responses is to try to inject some humor into the (stressful) interview process by saying to the interviewer, "I want to have your job!" I've heard interviewers I work with rail against this answer, to the point of being turned off of a candidate for that one answer.
Of course, the answer is glib and not only misses a chance for some considered discussion, but it shoots down any opportunity for follow-up conversation -- I would imagine "I want your job" being met with silence -- there's nothing else to say.
It's probably obvious to anyone who has listened to the interviewing series, but a good answer would be to describe the type of role you'd like to play in a firm, including responsibilities. To make this a GREAT answer, similar to the weakness question, you would go on to describe what actions you are taking NOW to prepare yourself for that role.