This thread is very informative as to the application process, what to expect, et cetera, but there is very little information from real JAG officers as to what life is like as a JAG in any of the services. Are there any good threads or other forums that discuss JAG in-depth?
Five days a week I show up to work at 0615 for an accountability formation and to salute the flag at 0630. Then, I do PT with my platoon -- there never is a PT plan, just a requirement to exercise until 0730. Next, I take a quick shower and get to my office no later than 0815. And then I spend at least the next 10-11 hours bouncing between randomly scheduled meetings and training sessions, "emergency" assignments that are mostly pointless, and other work that requires no legal training. Sometimes I do legal work -- I almost never practice at the same level as I did when I was a civilian attorney. I spend much less time with my family than I thought I would, and I have almost no ability to influence some of the biggest factors that affect my family's quality of life.
If you join the JAG Corps at this point (through direct commission), you'll get promoted to captain within six months to a year, but you won't really be eligible for the next promotion for another seven years. You'll spend those seven years worrying more about your evaluation reports than is healthy, even though the whole evaluation reporting system has really become a game of managing and leveraging one's rating profile. You'll also feel a lot of pressure to chase after shittier and shittier jobs just to make yourself feel better about your chances for promotion -- after all, there is no other type of advancement when you can't get promoted until have served a certain number of years.
You'll constantly think about whether you should stay in or get out.