The right stuff

Think about what it means when someone says; "The right stuff".  Is there a such a thing as the left stuff?  Perhaps it is my medication addled brain but I am pondering this.  I know that NASA and the airforce used to look for people who had the stuff. 

Perhaps the reason I did not walk on the moon was because I have never owned pink Barbie luggage or a royal blue starched jumpsuit. 

What does a person look like who possesses the wrong stuff?  6 fingers on one hand?  One eye at the back of their head?  Perhaps there are special jobs for the people that have the wrong stuff!