Counting Chickens
I'd be real careful about going military just to get airline time. It's a tricky tight rope to walk. There are new things called "IA's" in the Navy that can have you managing a prison in Baghdad when you figured you were on your way your T-34 shore tour. P-3's are getting sent to the boneyard everyday and the slots for T-44/C-12 instructors are very very very limited. That being said, everyone I know that signed up for whatever reason has loved what they have flown. E-2guy is right that helo guys seem to be extremely happy flying 60's. There are ways to make flying in the military work for you when its time to get to the airlines, but my word of caution is there are many unknowns, both good and bad, waiting for you when you sign that contract. I've had a blast and I'd do it again tomorrow. You're guaranteed to meet your best friends for life.