Let's start with WHY did you get an interview: well you have the right MCAT score, your grades look good, your LORs were nice, and if you applied to a state school you are in-state.
Now you have your interview: let's see what the adcoms are looking at while you are in with them.
1) your demeanor. Do you come off as a real sincere person or do you come off as pompous and arrogant. DO you think that because you scored a 35 on your MCAT that a DO school will be thankful to have you in their school or are you thankful that you were considered?
2) What do you know about osteopathy other than A.T. Still came up with it and that it involves a whole body approach?
3) Let's talk about your personal statement. If the interviewer asks you something specific about your personal statement and you have no clue what they are talking about, is this a clue that what you wrote was actually made up? Did you really take the time to find out what medicine was like or did you get enamored by what you saw on television?
4) Why do you want to come to our school? Are there specific reasons? Did you research the school and say, hey that is the place for me? Or did you throw darts and applied to wherever they landed.
5) Were you rude to anyone? Cleaning staff, secretaries?
6) During the tour given by a student, did you say something that made the student tour guide let the adcom know that they do not want to see you in their school? Remember, you are ON the ENTIRE day.
7) If you had bad grades was it because of a life event or were you just lazy?
8) Do you seem like you care?
9) If you are applying to a state school, do you sound like you are going to stay in state to practice?