To the OP:
Military medicine generates alot of discussion in different internet forums. I suggest you check out the Student Doctor's Network forum on Military Medicine (
http://forums.studentdoctor.net/forumdisplay.php?f=35 ).
There are a few posters there that are blindingly positive, and many who are embittered and negative. As with everything else in life, the people who are negative always make more noise, so take the ratio with a grain of salt.
I was on active duty for over 10 years before going to medical school, now I'm currently a resident in an army general surgery program. I came into military medicine fully knowing the good things and the bad things about the army in general, so I am less disenchanted than many <g>, but I have not yet graduated so everything I know about life as an attending is all second-hand.
As far as becoming a physician in an SF unit goes, the majority of them are Emergency Medicine or FP trained , but I would caution you against choosing a medical specialty based solely on your desire to serve in a SF unit. Remember, when you choose your residency, that is the career you will be doing for the rest of your working life, as opposed to a 2-3 year tour with an SF unit (if you can even get a slot).
I originally went to medical school planning on returning as a Bn Surgeon in an SF unit, but then discovered I would rather chew off my own arm than do Emergency Medicine for a living. No offense to EM - two other 18Ds I went to med school with both did EM, and they will be outstanding Bn Surgeons one day - it was just that I realized that EM was not for me, and I would absolutely HATE doing it as a civilian doc 10 or 20 years from now.
Pay attention to Doczilla's comment about waiting to commit to the military - recruiters for HPSP scholarships have been accused of bending the truth somewhat, and occasionally someone with a HPSP commitment will not match into the residency they want, or they will be stuck in an undesireable location for residency. On the other hand, by doing your residency in the military system, you will be able to develop more contacts that will help you get a desireable assignement after residency. Take your pick.
The attendings who seem the bitterest are the ones who went into the HPSP process without knowing what they were getting into, and got stuck in a small medical facility with low volume where they felt their skills were not utilized. Of course, that's just my impression, take it with a grain of salt.
Good luck with medical school, and keep an OPEN MIND with regards to what kind of residency you want to do. Do NOT choose a residency based on attractiveness for a 2-3 year tour in a particular unit that you may or may not get.