Being in the military, in general, is different from civilian life. There are those in uniform, though, that think us Air Force types are pretty much 'civies' compared to the combat arms/hard army types.
Free time depends on a multitude of factors. What trade you are, your current posting/what role your unit plays, what your position is in that unit, etc.
Operational Squadron aircrew and techs, for example, are fairly busy compared to a clerk posted to a Wing Orderly Room in the 'time off' aspect, at least where I am at currently. The Wing OR folks are more of a Mon - Fri, 8 to 4 gig where we are ruled by the flying schedule and operations tempo.
However, in contrast, aircrew who are posted to instructional positions at training establishments don't usually deploy like the operational squadron types and would be more like the Mon-Fri 8 to 4 gig as well.