Maybe you should have people starting to take the Meyers-Briggs Type Indictor to get a better understanding of them. For example, I'm an INTP personality. Which according to the test is less than 1% of the population. So I for sure am not normal.
Also, you can read about the person's personality right away and see if you're a match.
Here's mine.
http://typelogic.com/intp.html