Everybody knows someone who worked like a dog their whole life and retired only because they were required to or it was somehow expected of them when they reached a certain age, and that lost soul ended up dropping dead within a year or so of retiring. There probably is something genetic going on with those kind of early deaths but I have to believe state of mind plays a prominent role as well.
It's funny people seem to respond to retirement differently. Some never really "retire" and manage somehow to keep their proverbial fingers in the (work) pie, others go through a period of transition and find their new stasis, some throw themselves into a new Life's Mission (oftentimes as volunteers) and yet others use the time to play and frolic as long as their energy and money allow.
How do you think you will approach retirement? You may be planning for it financially, but are you also planning how your days will be spent? Or will you approach this stage of your life as you have all the others, take it on the fly and adapt as needs be?