Re: bi-polar,borderline personality disorder,A.D.D. and socio pathic tendencies....
I don't know the answer to the question, I'm afraid! I believe that we all have genetic pre-dispositions to certain kinds of things that give rise to all of the symptoms we experience. I think the system of 'diagnosing' causes confusion - often people with similar symptoms are given different a diagnosis - diagnosing is often quite subjective (I was diagnosed with three different things in three days - just different doctors opinions, the symptoms were exactly the same).
I gave up with the conventional approach and switched to treating the symptoms individually and trying to figure out the cause of each of my symptoms - it seems to have helped so far.
Sorry to have nothing concrete - would be interesting to see what other people think.