I had two really nice interviewers. At first they asked simple questions trying to get to know you. Then they asked me "harder" questions, but I didn't get any ethics questions. I got questions about my major, my values, my school, why medicine, social issues. Most of the questions were the exact same ones from the Interview Feedback site. My advice would be to read over those questions. At the end I just asked them a couple of questions about A&M.
It was my first interview, so I can't really compare. I was really nervous, but they made me feel more comfortable during the interview.