Yes, it's the freedom to choose what you do and when you do it, and even with the humanitarian things with which we're involved, we know that we can always say "no."!
We've been retired for eight years now, but I still look forward to the start of term, knowing I haven't a) got to commute and b) not worry about work, students, trainees etc.
Going on holiday when you choose - we are off to Australia for the whole of October. And, as indinana says, to be able to have a day out without planning. (I'm in Devon, indinana, where are you?)
And, of course, seeing the DGC more often, and being there when needed.
It's great! And I get paid for doing this. Did work my socks off, though...