I wasn't referring to myself there, but making a general comment. An awful lot of people get problems when they retire because they thought of themselves as 'a fireman' or 'a teacher' or 'a nurse', and when you take that away you need a strong sense of self-esteem and purpose not to start feeling useless - the world carrying on while you rot in a corner, kind of thing. Some can do it, and I think I am one of them, but our society puts so much value on what we do rather than who we are that I am not surprised that some people struggle with retirement.
The guy I was referring to in my earlier post - I was a teacher in my first teaching post, and he was a senior teacher. He taught a full timetable (Maths, I think) but also ran the School Fund, looked after the school's minibus and 53-seater coach, and did a lot with sports teams. He was in the school evenings and weekends a lot of the time, helping out, organising, assisting. He was known as a safe pair of hands, ultra-reliable and hardworking and the kind of loyal employee that any organisation would be glad to have. He retired amid a great fanfare and then a year later the news went round - "Eric is dead". It shocked me (at the age of about 23) that someone so full of life and work could deteriorate so quickly. But that was the point - retirement had taken away 95% of what made Eric, Eric.
If anyone is like this, they should think long and hard about how they are going to value their own worth when their job/career is over. My point is that it isn't just a matter of finding ways to fill the time, as many people suppose.