What my friends told me about their interviews at USF in previous cycles:
The interviews are closed file so the interviewer doesn't know anything about you. However, often times the interviewers tend to be people who have simiar interests to yours. So though they don't advertise it those who see your app probably set you up with someone you will be able to connect with.
Two interviews: One faculty and One student interview.
Most people, with a few exceptions, had people who had similar interests as I said above. For instance, a friend of mine said he played viola or violin and his interview happened to be married to someone who was deeply involved with the same. Or on another occasion a current USF MS 2 talked about medical mission trips and community health and got paired up with people who were interested in the same sort of thing.
The interview questions from what many of these current med students told me was very straight forward. Essentially it was the tell me about yourself and why medicine sort of questions. There weren't too many ethical questions though they do occur on occasion.
Everyone who's interviewed here has told me its laid back so don't stress too much. They don't always tour the same facilities. Some interviews with USF will take you on a bus over to TGH, while other interview dates will do Moffitt tours. Because there are sooooo many facilities you won't be able to see them all, but generally will see at least one of the following: Shriners, Moffitt, or TGH.
Girls: I recommend looking for a good pair of aerosoles. Those are some of the most comfortable interview shoes and don't even make a lot of noise. I had heard all about aerosoles shoes last year when people on SDN were talking about girls interview attire but didn't own a pair until I recently went to Chicago. In chicago, a family friend gave me a pair and it is probably the most comfortable pair of business like shoes that I have ever owned in my life. I wear it to the clinic to volunteer and honestly can say its worth the investment.