TigerHawk agreed with what I have said here many times: Retirement is over-rated. What is your number? The false promise of idle retirement.
He doesn't get to all of the important considerations, though.
First, many have no option but to retire. Laid-off career guys in their 50s have a tough time finding employment. Some (esp government) jobs offer pensions after x years which make continuing in the job economically silly. OK, they can do something else - and many do.
Second, as Tiger notes, many have jobs which they do not particularly enjoy or with which they have become bored - yet have life responsibilities to fulfill. An "attitude adjustment" might be nice, but it ain't so easy. The main reward of many if not most jobs is the sense of fulfilling a family responsibility rather than the work itself.
Third, many value the notion of being "idle." "Idle" may be the wrong word, though, because most retired folks seem to stay pretty busy, from what I see. It can mean more time for hobbies, for fishing and hunting and boating and mowing your own lawns and fields, doing your own home repairs, spending more time with friends, volunteering, and maybe more trips.
Fourth, I think "the number" is important. If you hit your number (which few can say they have right now), work can be more enjoyable because it seems more optional. You know you can say "Take this job and shove it" whenever you want.
