Mate - Aussie has summed it up succinctly. Allow me to extrapolate unneccessarily:
Having now been in an airline job for two years (after 15 years in the RAAF) I can honestly say that flying in the RAAF was THE mother-fvcking greatest experience of my life.
And I should point out, I have done some frickin' awesome things: like doing lines of coke off the breasts of 18 year-old Russian whores whilst eating KFC chips and gravy.
In short: do the RAAF thing, no one ever does civvy flying before they join the RAAF and then says "man, that civvy flying was SH!T-TINS better than the RAAF!!!"