My opinion probably isn't a popular one, but I personally don't believe in such a thing. It sounds like a convenient excuse to continue destructive behavior...."I've got an addictive personality, I just can't help doing xyz...." Ridiculous!
Before you shoot me, understand this is coming from an ex alcoholic, ex drug addict, an ex smoker, an over-exerciser, and a strict borderline over-the-top vegetarian health freak. I don't believe I did/do those things because I had a personality disorder....I did/do them because I tend to do things in excess! But I've learned how to control my urges for alcohol, drugs, cigarettes by learning to recognize them for what they are and move on without giving in. The other stuff is getting dealt with by fate.
All these 'disorders' everyone's got these days play into the victim mentality plaguing our society. They make people feel helpless and doomed, when in reality we all hold the key to our own destiny.
Whatever our problems or our diagnosis, we can choose to overcome....it shouldn't define us.