I'm 41 now and the right knee has got a bit of a twinge in it. I get about the stage a little less now.
To be successful you have to be selfish, or else you never achieve. And once you get to your highest level, then you have to be unselfish. Stay reachable. Stay in touch. Don't isolate.
Terms like 'good' and 'bad' are extremely simplistic in what is a far more complex situation.

