Generally, I think the strength/weakness questions and where do you see yourself in X years questions are the worst. It just seems like the interviewer put no thought in coming up with questions that were particularly relevant for the job being interviewed for (unless said job is as a carnival strongman or a palm reader or something). A couple years back I was asked both of these questions by the interviewers (2 of them) when I interviewed for a city government paid-internship. After I answered, I then asked them what sort of work I'd be doing during the internship. They looked at each other, went 'ummm' and then eventually gave one of those half assed answers that isn't really an answer at all. Yep, they were doing interviews and not only couldn't come up with decent questions, they didn't even know what the person they were hiring was going to do (and one of the women that was conducting the interview was going to be directly overseeing the position I was interviewing for).