Nurse Manager Question:

You do not want to actually highlight a major regret, especially one that exposes an overall dissatisfaction with your life. Instead, focus on a smaller but significant, mishap and how it has made you a better nurse.
Good answer:
"When I was in college, I took an art class to supplement my curriculum. I didn't take it very seriously, and assumed that, compared to my biology classes, it would be a walk in the park. My failing grades at midterm showed me otherwise. I'd even jeopardized my scholarship status. I knew I had to get my act together. I spent the rest of the semester making up for it, ended up getting a decent grade in the class. I learned that no matter what I'm doing, I should strive to do it to the best of my ability. Otherwise, it's not worth doing at all."