A lot of what I was going to say has already been said upthread, but I’ll hit the high points.
I’d say that it’s true that your run-of-the-mill Texan is extremely proud of the state and his place in it. I’ve never been to another state where the state flag was flown with the frequency that it is in Texas. Add to that the propensity for decorating our houses and yards with lone stars, and it’s fairly easy to see.
As for me personally, I always identify myself as being from Texas as opposed to the United States. I’ve been thinking about it, and I can’t really say that I’m a Texan first and an American second, but the two are at the very least equal. Like someone else said, I’d rather live anywhere in Texas than anywhere else. I happen to love the Piney Woods where I’m from, but I could handle the plains of North Texas, the scrub of Central Texas, the mesas…hell, even the grit of the Permian basin.
Having said that…if you take a gander at my location you’ll notice that I’m only 25-30 miles from the Louisiana state line, and there is a distinctive coonass influence in our food, culture, etc. I’d say that the folks from Louisiana are just as loony about their state, to the extent that a lot of them despise Texas. The Acadian culture is probably “deeper” than many others in the U.S. Lots of us sound like we’re speaking a foreign language, but those cats actually DO.
Folks from Arkansas (again, right up the road) tend to kind of recognize the reputation (undeserved, really) of their state and keep quiet. Okies, like some of my coonass neighbors, hate Texas. My guess is because it tends to overshadow them.
I can’t really explain it. When we go to Shreveport for shopping or whatever, there is this indescribable sense of relief and pride when crossing back over the state line. It’s like, “whew, I’m home.” I mean sure, there are logical points I could cite, such as the lack of a state income tax, our very nice concealed handgun license law, lots of money/infrastructure…but that’s all secondary to just being in this state of mind.