I feel the relationship between clinician and patient, whether in a real medical setting or in play has clearly defined power roles.
The clinician is clearly in charge, but respectful of boundaries (unless of course you like being restrained and forced); while the patient is put in that position of vulnerability as they are exposed, poked, examined, and interrogated about their bodies.
From the physical aspect, I love the human body and being the clinician in play gives me the opportunity to appreciate all the small details that are rarely noticed, including:
Truly looking deeply in somebodies eyes
The texture of a tongue
The softness of skin
Listening to the heart pump life throughout the body
Montgomery tubercles (the bumps around the areolas) and the nipples themselves
The belly button
The genitals -we all love playing with them, but how often do we really appreciate the difference in penis shape and size or labia and cervix positions.
The difference in reactions from person to person when being examined.
What is it that draws you to enjoying your role?