PM&R was (a distant) 2nd on my list of things I was interested in.
Psychiatry was number 1.
I am especially interested in the psychology/psychiatry of MSK injury and rehabilitation, as anyone who's met people who are physically limited by injury and physical dysfunction (or been one themself) knows that it's a psychological minefield.
Issues of adjustment, depression, sleep trouble, obviously. But also cognitive-behavioral issues regarding commitment to intensive rehabilitation and PT. Just think about the nature of this statement:
"I feel like crap. Well, better enthusiastically and energetically bust my butt in the gym!"
Kinda an abnormal thought pattern but one that is highly important if you're going to be successful.
If you look at the people that overcome severe physical issues, they have that attitude. And I think that learning how to cultivate that attitude is exceedingly important for success.
I think that fits more as an area of psychiatry than it does PM&R though. Physiatrist tells the patient WHAT to do, psychiatrist helps them motivate themselves to actually do it. Or, physiatrist helps with alleviating pain and maximizing functionality, psychiatrist helps the patient accept the emotional and psychosocial issues of their pain and reduced function and move beyond them.
But that's just me.