Fair enough, mate. That's a valid instance of someone who was *genuinely* happy with his 'lot' in life, which revolved around his job. It's often not like that, though.
My dad gave up running his fish & chip business as soon as he'd amassed enough cash to see him (and my mum) out of this world, which was when he was just over 60, and didn't regret it one iota, because then they could enjoy life together, going out for lunch most days, long walks in the country, holidays abroad and spending time in their garden.
The very LAST thing in his mind was standing behind a counter serving the general public, from 4pm to midnight, six days a week [much as he 'enjoyed' it when he had to]!
I managed to 'retire' much earlier, largely through some clever investments, and I've never been happier, getting up in the morning and only doing what *I* feel like doing, not what someone else forces me to. Fortunately though, I've got umpteen different interests to keep me occupied, so I almost never get bored
Marco.