Not going gentle into that good night.

I am currently between books. I've sent off Naughty in Nice and I have to start the next Molly book in January, so I'm reading up on Tammany Hall and Irish politics. We're in Arizona and the weather is perfect. The desert beckons, there are great restaurants and yet I am feeling guilty because I'm not working. I should be starting a short story. I should be finishing my travel book on Australia.
I have to face that I am not good at doing nothing. I feel the need to be working all the time. And this is not good because most of my friends have retired or are approaching retirement. They are happily playing bridge, taking art classes or volunteering. And I--I cannot picture a life without writing, without working to deadlines, without flying around the country and making speeches. I keep telling myself that it would be good to slow down and not push myself so hard, but in truth I don't want to.
Luckily both series seem to be in demand still, my sales are still good, so there is no need for me to slow down my pace, but I can't help looking to the future. Will there be a time I have to stop writing, and if so, what would I do with myself all day? It's a scary thought. So I'm interested to know what others contemplating retirement feel about it. Who else intends to go on working for ever? Who looks forward to doing nothing? Am I unique?