I am terrified to retire. I am afraid I will get bored. Then what the Hell would I do??? I have a good friend that did what I do and he was essentially bought out at 63 years old. He is 70 now and wants back in! I think the key is staying engaged at some level but having a little more flexibility and less accountability.
If you are the kind of person, like I am, that is (was) afraid you are going to get bored, then you're not going to get bored. You are going to find stuff to do everyday and you are going to fix things that you have had to put off for a long time and do fun projects you have wanted to do for a long time.