Clinical Psychologist.
I was a philosophy major (metaphysics) my first year of undergrad but I decided I wanted something with more direct impact on others. This is not to suggest the study of philosophy does not have profound effects on the individual, but I wanted something with a more interpersonal impact.
To be Licensed one must have a Doctorate in clinical psychology from a graduate program accredited by the american Psychological Association.Grad school takes about five years, unless you screw around like I did, and it took MUCH longer! When I earned my degree, a Ph.D was it. That was before the Psy.D was developed, which is also acceptable for Licensure. After completion of the Doctorate, and 1 or 2 years experience, one can sit for a national exam, leading to state licensure. In Mass, only licensed psychologist can use the title "Psychologist", which is regulated by statute. Anyone can call themselves a "psychotherapist", but only one with a state license can be called "Psychologist".
I have done a very wide variety of practice foci, currently I'm working with geriatric patients in Nursing Homes.