Tom,
I agree that the Air Force is probably the best choice as to which branch will prepare you the best to become an FAA controller, followed by the Navy and Marine Corps. Regretfully in my over 24 years as an FAA controller I never had anyone that come out of the army make it to full certification. The reason that I thing that army controllers do poorly is because most of the bases only work helicopters, now the few army bases that have fixed wing and maybe flying clubs probably would do alright, but those are rare bases that work anything other than rotary wing.
The key is the more experience that you gain in the military, (tower and approach control) the better your chance of being successful in the FAA. So what this means is that you have to work hard to get assigned to towers that work a variety of traffic (just not cleared for take off or cleared to land stuff), with lots of pattern traffic, and try to get approach control certified somewhere, GCA experience is helpful but doesn't provide all the experience that you need.
I agree that the Air Force is probably the best choice as to which branch will prepare you the best to become an FAA controller, followed by the Navy and Marine Corps. Regretfully in my over 24 years as an FAA controller I never had anyone that come out of the army make it to full certification. The reason that I thing that army controllers do poorly is because most of the bases only work helicopters, now the few army bases that have fixed wing and maybe flying clubs probably would do alright, but those are rare bases that work anything other than rotary wing.
The key is the more experience that you gain in the military, (tower and approach control) the better your chance of being successful in the FAA. So what this means is that you have to work hard to get assigned to towers that work a variety of traffic (just not cleared for take off or cleared to land stuff), with lots of pattern traffic, and try to get approach control certified somewhere, GCA experience is helpful but doesn't provide all the experience that you need.