Do you love it when you find a plant that is all wilty & you water it & then the next day it is all perked up? If so consider nephrology.
What do you call a nephrologist who tweets too much? Tweetus insipidus. A cardiologist? Tachytweetitus. An endocrinologist? Hypertweetism.
When a nurse pages b/c he thinks there is a mistake and you spend 10 min finding there isn't, make sure you thank him for doing it right.