LOL! "On the job" has a very different connotation in the UK.
I believe Rima's girlfriend (also a physician) wears a beautiful DJ. It's functional, but smart at the same time. Also, I've found patients tend to judge their doctor's via their watches, and clothes -- if they're not in pain, obviously -- so Rolexes work well.
As for me, when I had a job-job, I wore very simple watches. NO ROLEXES the first year. That's just tacky for an up-and-coming person in a firm, etc.
But hey, wear what you want!