I half hijacked a different thread after a comment from Noel, so thought it best to start a new one

So the question is : After a fruitful and enjoyable many years fell running your knees start to give out and your reactions prevent you from charging down hill what do you want to take up to fill your time?

Noel suggested - Wildlife Photography
I suggested - Wood Carving

Anybody else have any suggestions that might tempt me in the distant future?