Coongratulations, SGH! Having the time to do those things we want to do but never find time for will be nice.
A couple of my friends have retired and say they don't know how they had time to work. They usually sub 4-8 days each month and love it. Their thoughts are that they enjoy not being committed to having to be around. Of course, both of their husbands are retired teachers, too, so they have the opportunity to travel at different times.
No matter what you do, just make sure you enjoy it.