Texas is pretty big. There is a great difference between different areas. Austin is far closer to California with the amount of leftists in there, plus their motto is "Keep Austin weird" which describes the mentality pretty well. San Antonio and Dallas are in a similar boat. Fort Worth is the largest city governed by the right, but it still is a pretty big city so most have the city mentality (I don't know you, but as long as you are cool, we cool). Smaller cities and towns will have more neighborly views, likely wanting to know who you are and what you are up to (more as conversation and getting to know you than being aggressive).

Lately I have noticed a general decrease in driving skill. I mention this because I see it as a measure of hospitality- knowing how to drive at the appropriate speed in the appropriate lane is part of being a good neighbor. If the guy who drives the speed limit has to go into the passing lane because the middle lane is taken by someone going under, then the speeder weaves in and out of the right lane. This aggravates all involved. Ten years ago you could count on someone making room for you in traffic. Now you might find room, or you might not.

In many ways the core of America has been independent stubbornness. If you believe that, Texas is perhaps one of the most patriotic of states, embodying its values. There is a reason about 40% of our armed forces volunteer from Texas. If you need help and ask, people will help, but generally you are expected to deal with stuff on your own, and you will get left alone. As I mentioned at the start, however, Texas is big and what you experience will greatly vary depending on where you are.

If you haven't dealt with Texas summer though, you might want to try it before you decide. Texas is noticeably hot. It isn't Arizona or New Mexico, but getting above 100 F every year is pretty common. I think just a decade ago Dallas had 100 days of 100 degree weather in one year.