11 years AF here, crew chief on F-16s. +1 on everything Chrisw said. Linguist might be best for you and huge in the civilian world. FYI, I believe there is an age cut-off for Air Traffic Controller in the civilian world so keep that in mind if you plan on doing 20 years military.
If becoming an officer is even remotely in your mind I will suggest another 4 years in the civilian world getting a Bachelors. No matter what the recruiter tells you it is not easy to go enlisted to officer. And yes, there are bennies associated with being an officer during and after the military.
From personal experieince, I thought it would be great to get in the aircraft maintenance field and I loved it. I grew up working on cars with my pops and jets are just as fun. If I had to do over from a career perspective I would go in the medical field. X-ray techs have a good life, there is good job security and the med field will never go away. Like I said I have 11 years active duty, 2 years with Lockheed Martin on the JSF and working on a Masters of Aeronautical Science and I don't make $80K a year.
Air Combat Controller, TAC-P, and pararescue will get you in the combat role if that is your thing but I don't think there is much in the civilian world for that training.
In the end you have to ask yourself what you are passionate about and go from there. Oh and AF all the way!!!
