When is it time?

When is it time to step away from the game? As a person who loves the game, there is a time to step away gracefully and enjoy the spoils of your success. So many have not, trying to find the thrill of the game at a point where the game has passed you by. Jordan, Mays, and now Favre are all examples who had their chance to go out on top but couldn't say goodbye. Are we any different? Are their any pursuits we continue after the point of no return? Hoop for me. I am not good about the stretching thing. I don't know when to back off on the defensive end when a younger kid is taking it to the basket. Now I am having MRI's and hobbling around. Maybe it is time....