I'm with you there man. There's an old psychology joke that speaks to this...
If you meet someone who doesn't have a mental illness, then they haven't been assessed thoroughly enough yet. ;-)
(it's a stupid joke, and I don't believe it, but it does speak to how black and white the polythetic diagnostic system is). I usually tell my clients that I don't believe in diagnosis (I'm much more inline with Thomas Zsaz) in that dx are just labels for behaviors that fall somewhere on a normal curve... but I have to diagnose something for insurance companies.
Good luck with the LPC exam! I took it twice within a week because I wanted to make sure I passed in both Missouri and Illinois. I was supposed to get different versions of the test, but they were exactly the same. I remembered all the questions from the first test so I was able to finish it within about 25 minutes and they give you 4 hours. They thought I cheated until I explained it! ;-)
Psychbass