No, but I'm connected to and with a lot of folks who have served. My mother actually worked for the Ministry of Defence years ago (I didn't know THAT bit of information until filling out an SF-86 ... or whatever the "thinking about doing Federal work" form is called).
I think it's a very mixed experience, joining the armed services.
A friend of mine from the past joined and got to see Germany and play around the DMZ.
Another friend (20 years at this point) joined the Army during Gulf War II: The Return and ended up as a 51-tango with a job of driving around a "full-bird" colonel.
Another friend of mine (the Zen practitioner/student/monk) was going to join up with MI, but bailed on signing the contract when they couldn't guarantee his MOS.
I myself considered working in MI and/or for the State Department as a SigInt type, but I got over that. In retrospect, *if* I would have received an MI MOS or a SigInt posting, it could have been a nice thing to do. However, the whole problem arises with the realization that you become a non-person while in the armed services. If you get orders to go or do something, that's the end of it. This works out okay ... until it doesn't.
I just never really wanted to gamble on others doing things "the right way" and my ability to "just follow orders." So, no, I never ended up doing any military service.