Different folks, different opinions...this is good.
Been retired for a long time now and I don't miss it one bunch. I had 28 years with DND and 15 in the airline industry and the airline industry flying was the icing on the cake, good money and an "easy" job. In all honesty, my Military flying career was more fun, more places, and better fun toys to fly.
I think one reason many feel depressed, if it goes that far,(depressed), when they hang up their spurs is that their life revolved around the industry and perhaps not enough time was spent building a library of interests outside of the job. I flew with a few fellows who indicated that pending retirement was not something they wanted to embrace and their "life" would be on a severe down-slope once punted through the goal posts.
I will not bore you with a lists of my interests and what I do now but suffice to say the days are not long enough for me to get everything done that I want to do and I normally exist on 5 hours of sleep a night. Yes....... the light at the end of the tunnel is getting brighter, but, as the saying goes............
Life should not be a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside in a cloud of smoke, a glass of wine in one hand, chocolate in the other, thoroughly used up, totally worn out, and loudly proclaiming "Holy sh!t..... what a Ride!”