Hello Foxyboxer,
I just had my interview at MCP last week. I have heard nothing but good interview experiences there, but mine was slightly different. I was expecting many of the basics like "Why did you apply here" and "Why do you want to be a doctor?" Instead I got grilled about how I would handle undocumented minorities as patients and why the mortality rate is 50% across the street from the hospital. I hope I'm not scaring you, but this was my interview for the first ten minutes or so.
The rest was very conversational, in which I was able to ask questions of my own. It all depends on who you get on the day of and what is on your application. Being from a heavily populated area in California, I was asked about those subjects above. Try not to worry too much, it seems my interview was the deviation from the norm. Everyone else that day had a pretty conversational interview from what I heard. It was unnerving for my first interview, though.
The student interview is over lunch and a lot more informal. Here is where you get the "what do you do in your spare time?" questions. Just trying to figure out if you would fit in at the school.
Hope this is helpful. Good luck and know your application well.