"I am most often challenged by people who can't find joy at the moment. As simple as it sounds, I went into medicine because I'm passionate about it and can find joy in the most stressful situations because I know my work is helping to better someone's life. While I don't suspect that I will encounter this often as a urology resident, my approach would be to talk with the person I found to be in a negative mood to help brighten the moment and their day."

When answering this question, it is best to pick a quality that doesn't reflect poorly on you. Talking about demanding personalities may make you seem lazy or unable to work with demanding faculty at the program you are interviewing with. Instead, choose a quality that prevents the ability of even the most competent and hard-working doctors from delivering high-quality care or working as part of a high-functioning team.