The main thing is, I want to make a lot of money. I don't really care what kind of work I do to earn it, but I want to make at least $300k/year. Business careers are too iffy, with one's success dependent upon connections and chance meetings with important people.
The medical field, though, is the best way to earn a stable $300k+ income every year; you get accepted to medical/dental school, you graduate medical/dental school, and you begin practicing as an associate, partner, etc. I don't know how it is in the medical field, but new dentists tend to have no trouble whatsoever securing positions as associates with established dental practices.
If I went to medical school and didn't go into anesthesiology or radiology or some other high-paying speciality, I would probably just take a general practice slot.
Why?
Being a general practitioner lets you take advantage of something that specialists don't have: versatility.
For example, there is a doctor in my city who calls herself a "bariatrics doctor." That is a fancy way to say "weight-loss doctor," and all she does is throw diet pills and bullsh*t alternative health therapies at her "patients" and charge through the roof for it, and she wraps the whole fiasco up in a flashy, marketing-driven exterior.
Another doctor markets his practice in the ilk of a dermatological spa -- except that he's not a dermatologist. Nope; he's a good ol' general practitioner, just like our "bariatrics" friend described above. He essentially operates a Botox mill, while at the same time aggressively pushing all sorts of blemish-removing treatments and cosmetic therapies that edge into the territory of simple plastic surgeries.
Sometimes, I wonder if it would be easier to just go to a D.O. school and cruise into a family medicine residency than to go to dental school and struggle to maintain the near-perfect grades necessary to gain acceptance to an orthodontics residency.
I think you will find that I don't exactly have in my mind a career field of choice; rather, I am open to any career that will buy a most luxurious lifestyle.