Great discussion and points to ponder from all, especially LowSlowT2 (you go, brotha).
Another thing to consider, and I think important, is that ten-point preference for federal hiring kicks in at the 30% disabled rating. That's huge, because the federal hiring system is a ridiculous racket, and having that advantage is huge. So huge that it's often the difference between getting hired or not over a LESS qualified applicant.
It's ESPECIALLY important for RETIRED members, because by law, once you've retired, you get zip until and unless you hit 30%. The federal hiring system favors those who separated before retirement, as they don't have the benefit of retirement pay.
Not advocating cheating or fraud, just a point to consider if you have some legit conditions (that won't ground you if you still wanna fly as a civilian) and might be in the market for a federal job...
Also, and I think it's been said, be very careful as you prepare to separate/retire if you want to fly in the post-military world. I've seen more than a few aviators drooling over the 50% disabled rating that comes with sleep apnea (don't get me started) until I point out the hassle/delay/extra work it'll cause with getting a Class 1 physical.