People conform to certain stereotypes, sometimes knowingly,
sometimes unknowingly. Mind you,, most people believe that
they're "normal". That's a stereotype. Of course there are
different stereotypes of normals to different people, but every
culture has some sort of stereotype of normal that they
basically accept.
While I believe we're all individuals... at the same time, our
mannerisms, assumptions about life, how we think, doesn't just
fall magically from the sky either. We're shaped and work within
those shapes, sometimes busting free of them and absorbing other
shapes. Ok, that doesn't help an ISTP at all does it?