Retired as soon as I could at 62 even though I loved my job. I do not have longevity in my family history and wanted to be sure to experience what it is like to be a kid again, with no responsibilities. Now just over a year into retirement, I can say that I have absolutely no regrets. Of course I've heard the stories about being bored, regretting retirement early and such, but I've not experienced that even for a moment.
As to the experience so far, it has been one of the best of my life. I do not plan my days, do not ever have an agenda, and each day I wake up wondering what I will do that day. At the end of that day I find that I have either accomplished something useful, or that I have done nothing that an adult finds "accomplished". Either way, I feel completely satisfied that I have survived another day, and look forward to waking up the next morning to do the same.
As an example, a couple of moths ago I woke up that morning and decided to build a generator shack that included places for garden tools, which morphed into the addition of a wood shed - a project I would not have done when I was working. A spur of the moment decision to do something that was very satisfying, and since then I have done many things I never imagined I would do.
The bottom line for me is that retirement has become something I never would have dreamed of, and I am thankful that I decided to retire as early as I could. Of course, financially preparing for retirement is an absolute must. For me, investing in my own retirement packages to the point where Social Security is not needed was the target point.
To sum it up, imagine what it felt like to be a kid on summer vacation all those decades ago, and then apply it to how you would feel today being on vacation for the rest of your life.