But you'll be looking and working in people's mouths all day. I say, don't do anything you're not passionate about. People end up in these fields for the wrong reasons, i.e., money, and end up becoming miserable people.
This is really another argument _for_ becoming a dentist instead of some other specialty. The mouth is one of the nicest, least disgusting bits of anatomy you might aspire to work with as a medical professional (after optometrists, I guess). People go into medicine for all kinds of reasons -- money, prestige, religion, a desire to feel helpful -- but not because they're easily grossed out.