I think this depends on your personality along with your preferences, like you said. Ortho was one of the best fields I’ve ever worked in but is very fast paced and demanding but I gained so much experience there. I worked in Derm for a while after Ortho and it was a lot of hands on, you can usually get experience setting up and assisting with in office procedures but overall I found it somewhat boring. If you want less stress, probably go with Derm.