I spent some time in the Coast Guard. While I love ships and the sea, and enjoyed my time in, the military isn't really a good fit for my personality career-wise, and I actually had a better time of it working the groundfish fleet out of Dutch Harbor AK.
Remember that we are now at war and every guy coming home with military experience (=exact same resume you will have when you get out) is going to be competing for the same dwindling number of jobs.
So if you are serious enough about the military to say that you are interested in making a legitimate career out of it, then go for it. IF it's something you are doing because you have no other option, you'll be unhappy.
There are other similar types of careers such as the merchant marine, forest service, firefighting, etc. that you'd get plenty of satisfaction from and end up with a pretty unique life experience.
Just my sack o' pennies...