Joined the Navy at 17
Joined the National Guard at 34 (thought I wanted to set some roots)
Joined the Army Reserve at 39
Naval Aviation was the most challenging and the most fun but as others have said before me, each branch has it's own flavor, I miss them all.
TT
Graduated college with a Master's Degree in psychology in 1979 (Carter Administration). My best job opportunity was running a Planned Parenthood Clinic at $10K per year.
Considered PhD work but had no more money. I stumbled across Armed Services Scholarships for medical professionals. I applied but was turned down but they offered me flight training instead. Go figure!
Opted for Surface Line and after driving destroyers they made me an intelligence officer. Iran-Iraq War (been there), Khadaffi's Line of Death (crossed it), Grenada (was there), Desert Shield/Storm (8 months at sea), Afghanistan strikes I (1998. Did those too). Rose through the ranks to Captain and commanding officer of a major intelligence command.
One helluva wild ride.