Truth: No, that would be the mosquitos.
As for Jones and Wayne:  Yuck.
Truth: No, that would be Boston.  Texan drivers are friendly psychopaths, who give you a nice wave as they run your ass off the road.
Texas Myth:  All Texans speak with a Texan twang.
Truth:  Only when there are tourists around, the rest of the time we go back to normal.
No, really, actually there are about 5 distinct accents in Texas, depending on the location.  The West Texas Drawl, the faint spanish accent, the East Texas accent, gradually blending into a Southern one, and a straight midwest sounding one.
No, the Western edge (El Paso, the parts from Van Horn West), is mountainous, all the way down through Big Bend.
West Texas, by the way, is East of El Paso by several hours.
One day (many moons ago) I drove from Lubbock (having finished a work assignment of several months there) back to Houston (where I lived more permanently).  This was in December.  The beginning of the trip, I had to drive slowly and carefully because of the snow.  By San Angelo, I had to ditch the jackets.  By the time I was in Houston, I had to change into a short sleeve shirt, because it was 70.  Very big climate variations across the state.
Texas Myth:  We’re all Cowboys.
Truth:  The vast majority if us is city folk.  We put on the stetsons and boots for the tourists.  (Or for fun).