I disagree. I found a self diagnosis of personality disorder helpful. I was able to read the characteristics, identify the ones that fit and then actively work toward changing them. It also allowed me not to be upset with myself when those quirks were acting up. I used the definition as a starting point for my own self directed change. The other thing I learned is that there is no accepted cure for any of the PDs except one. They are wrong of course, but they are learning.