Invisible Woman
Senior Member (Voting Rights)
if individuals are very driven individuals doing lots of different things spending long periods with high cortisol levels, this may result in adrenal fatigue resulting in reduced cortisol levels.
I know that many people believe there are adrenal issues, however there is absolutely no evidence indicating that people with ME are any more driven than anyone else. I believe that some research has actually shown that personality type is not a factor. No idea who the researchers were though.
Edit - here is a recent thread that contains a some good point on personality and ME