I truly loved the interview experience, personally. It was very informal and more of a conversation. I did practice for the standardized patient exercise with the attending I shadowed with at Georgetown a few days prior, which I think helped a lot. But overall, if invited to interview it is more about personality than academics at that point, so being your true, genuine self is probably the best advice I would offer. Obviously make sure you do your research about why you would want to join Tulane, and highlight community service, community-medicine etc.