Well, I've wanted to be in the military since I was little, mostly out of duty reasons and because honestly it seemed pretty cool. But I never knew anyone in the military, and friends and family were all pretty incredulous at my interest, so outside of making attempts to apply for service academies it wasn't something I strongly pursued. The call to service has persisted, though.
There's that, and then there's the benefits--travel, structure, self-improvement, money for school, whatever. But the biggest thing is the call to service. I'm not really sure what I want to do, as I'm not sure what's even available. I've thought about doing medic-type work yet don't have any sort of background beyond CPR certification. Is there a place that lists all the jobs?