If you prepare for an interview like how you should, you should be fine with answering their generic questions (ie

escribe yourself in one word, when were your ethics tested, etc). For most of the specific oddball questions at certain schools just check SDN's interview feedback, most of the reviews seemed to be pretty accurate.
My experience was that most schools just want to know if you are interested in their school. Therefore, spend a lot of your time doing research on their school. Interviewers are more impressed if you can ask
specific questions about their school (ie: that means not asking about how many students specialize or what their requirements are because every school has their own requirements). For example ask about the school about things that you have researched on their website. This way you can interact/participate in the discussion after they respond. This is much more impressive and shows more interest than simply asking "what % of your students pass NBDE?".
Also, i think someone else mentioned something like be careful when commenting on something that you don't like about their school. That rings very true. Don't be arrogant, that is probably the worst thing you can do.
other than that, don't stress that much about the interview. most of the ones that i went to were really laid back and not very stressful. so don't worry, and look forward to the experience