The Affiliation

Why do we all associate ourselves somewhere?  Like saying I'm Texan or Greek.  Does that define us, or somehow make us better or worse than someone else?  What characteristics do all Texans have - without fail, across the board - other than being from Texas?  What does me saying that I'm from Texas really tell someone about me?  We're not all short or tall, not all blonde or brunette, not all black or white.  We don't all have accents, or drive trucks, or own horses, or have a gun in the back window...much to the dismay of common belief.  We have such pride in where we come from, and yet where we come from really doesn't say anything about who we are.