Stating how much you loved your experiences in the OR is a good start. You also mentioned how everyone works together - you could write something about thriving in a team setting, which is definitely something you find in the OR. You also mentioned seeing interesting cases - what about writing something about how interesting you find the diversity of cases and how the OR allows you to interact with patients of all age groups, backgrounds, and health problems. I would leave out comments about the schedule. Some folks tend to think the OR is a typical Mon - Fri 8 hr-a-day job and it doesn't always work out that way. At least, that is what I have found working in a hospital OR. Personally, something that I enjoy about the OR is that we are helping peope to "fix a problem". It could be something kind of minor like a circumcision or something more intense like a bypass. Overall, though, our main goal is to help our patients by providing a unique service that can change their lives, which we hope is for the best.