The risk of dying of boredom is a serious one for me. I live a life that is not terribly risky and the risks I do have are linked to some kind of reward. Just risk for risk sake (i.e. adrenalin) doesn't appear to me.

All of life is a risk and eventually we lose the game - best to enjoy it while you can and not hide in a corner of your room - after all, the wall could fall on you...