I am not one personally, but I do work in the medical field. I always see ads needing medical assistants, so I think you are right that it is in high demand. There will always be doctors, and thus there will always be need for MAs. With that said, the MAs around here only get paid $8-10 an hour and most doctors don't want to pay much more than that. If money isn't an issue for you, then I think it would be a good choice (and then again, maybe that salary range varies from place to place).
Re: NTR: Any Medical Asst's?