My only regret when I left was that I hadn't left sooner.
That said, after a while the irritants die off and generally I remember only the good stuff (that said, I still have the odd Victor Meldrew day).
I even had withdrawal symptoms and went back with the RAuxAF for a couple of trips which was 'interesting' to say the least.
BUT, the arrival of the pension is gratefully received each month - tends to take the sting out of the sh1t we all endured.
I am SO glad I'm not having to put up with what the poor sods are putting up with now - in ALL the Armed Services. I reckon I had it easy . . .