I am 66.5 years old and have no desire to check out of the net.
I wish to be alive as long as I can function per usual, and experience life as I always have.
I have kept myself physically fit, so health issues are not a problem. I eat right and exercise and try my best to take care of myself. I am able to still do about anything I have in the past, maybe a little slower and more carefully. I am quite passionate about doing the things that interest me.
About the only thing I can say I have lost, by being my current age, is patience. This may be just a symptom of having already heard the BS for so long, it becomes too difficult to keep on listening to it. I hope that statement makes sense, it was the best way I knew to put it.
I am retired and I don't have to have a job making money. I can and have opted out of the work a day world, where one gets up and treads off to some kind of employment, in order to pay for roof/food. I am thankful I am not in that situation.
I do have several things on tap that occupy my time pretty fully, and that is what I consider to be one of the most important things of retirement. If you fail to use your muscles, you lose them, and if you fail to use your mental capacity you can also lose that. I look for challenges, even if it were something broken that I have to figure out how to repair. Think about that. You then need to explore the object or mission in question. You need to understand how it works, and why it currently needs attention. This causes you to function both physically and mentally, and when the object/thing/situation is back as it should be, and you did it, then you feel rewarded. This keeps you in tune and in many cases, it keeps you updated on various subjects.
Now I could simply get out of bed and sit by the window. If my water heater goes out, I have the funds to call for a new one, and have it installed. I also now have the time to drive somewhere, load up a new heater, and install it myself, saving a labor bill from a plumber. Were the installation strange to me, I could research how to install it, etc. This keeps you driving your train. A while back, I noticed my 76 year old neighbor working on his mower. He had it all jacked up and was pulling the deck to install new blades and a belt. He was slower than a 30 year old, but very deliberate and careful. He finished the job by asking me to hold one side of the deck while he attached the bolts.
Age is not important, it's how one is mentally prepared (at any age).