Disclaimer: n=1 My interview was indeed very relaxed. The conversation was informed by my application, but it had the feeling more of a personal conversation about my passions, ideals, dreams, etc. He steered a lot of questions toward my "story"--how I've grown, changed, adapted, blah blah. I got one or two pre-arranged questions, but they were fun ones. The only ethical-style questions I got were those that came up organically throughout the course of the conversation (e.g. if I mentioned I was driven toward medicine mostly by idealism, he'd ask something like "how does a physician keep from losing her idealistic spirit throughout her career?"--that sort of thing). There weren't any canned "What would you do in X situation" kind of questions. 100% I came away with the feeling that when they say they're looking for "fit", they really mean it. The theme of the conversation was essentially, "how has your life prepared you to serve others." It was a really positive experience for me--I hope the same for you!