i may be the only person in history to have done this, but
I went to an appointment with a new Psychiatrist and explained to him why I was convinced that apergers explained me better than any other diagnosis. I have a degree in psych so I am familiar with the diagnostic criteria, I basically to make my argument by describing (in detail) various events throughout my life that were clear examples of traits that were consistent with the diagnosis, that to me it provided an explanation as to why I score 47 on the AQ, I really didn't notice that I had been telling all of this to the wall (not even looking towards him), though it does really stand out in my mind how much he looked like Col. Curts from Apocolypse now. In the end he pretty much said, yeah I agree with you, but what do you want from me? He was expecting to be prescribing meds.
I think as an adult it is both easier and harder to get diagnosed, both because we do not fit the sterotype (i work with adults who have LFA) how could I possibly have the same dx as one of my clients, but in our favor the reality that you probably won't be looking to get state funded services, they test the s**t out of kids b/c they don't want to have to pay, lets be honest, as adults we are most often looking for answers, to understand ourselves,