I retired four and a half years ago from federal service at age 60. The staff at our HR office told me that in all their years of counseling employees about retirement, only ONE had ever come back to say he had retired too early. The general accumulated wisdom was to retire as soon as one could do so comfortably. My wife and I certainly aren't wealthy, but we have enough money to live comfortably, travel, and enjoy our retirement.
In my case, a cluster of significant events all occurred at once: turning 60; 30 years of service to the government; major restructuring in the organization that I didn't really care to deal with; and the fact that I could carry my health insurance into retirement. Additionally, several good friends had retired from their professions at an even younger age, and they were are all quite happy with their decisions. Our son and his wife had just had twins, and they would need a lot of help with child care in the coming months and years, plus our daughter and her military husband were stationed far away and we wanted time for more frequent visits to see them and their kids as well. All told, retiring was not a hard decision for me, and I've never regretted it at all.
The PCa diagnosis came four years after retirement. I knew I had the classic symptoms of an enlarged prostate, but never had considered that I might actually have cancer. I think it was probably easier to accept the bad news as a retired person than it would have been had I still been working.
People always told me I was very good at my particular profession, but home and family were always where my heart was. When at work, I gave it may all, but when I was home I hardly ever gave the office a thought. Nothing in life gives me more joy at present than being a PawPaw loved by 7 grandchildren. Whether or not there's an afterlife, I find it comforting to consider that I'll live on in their memories as a loving and fun PawPaw.
So many variables. Everyone's situation is different. What a great series of comments!