Yes, Texas is "Huge!"... and it is so diverse <understatement>. That's what I meant at the beginning of this thread about OP's query being like asking, "I'm going to Europe. What should I see."
For an eye-opening exercise take a compass and measure between El Paso and, say, Dallas. Then draw a circle using any city, say Chicago, as the center. Then imagine driving to the perimeter.
"It's tough to make predictions, especially when it involves the future." ~Attributed to many
"In theory, there is no difference between theory and practice. But, in practice, there is." ~(perhaps by) Yogi Berra
"Those who have knowledge, don't predict. Those who predict, don't have knowledge."~ Lau tzu