I've lived here for 21 years. Majority of that was in Austin. It's a great town, full of just about anything you could possibly want. Traffic is a NIGHTMARE because the town is booming and is at 97% capacity and simply can not grow fast enough to handle all the people. That being said, I love it.
Climate is not humid at all, gets damn hot in summer, see some snow and ice in the winter every other year or so. Land is expensive, although not compared to some places people on here mention. A $250k house will be a very nice place to call home. Very nice. Austin is on the outskirts of what's called the Hill Country. Why? Cuz it's hilly, duh. Lots of fun roads to play on, but cops are no joke. They don't play when it comes to speeding tickets.
About 6 years ago I moved 2.5 hrs north (125 miles exactly from where I lived in Austin) to Brownwood, TX. Oh, when you get to Texas, you quit measuring by miles and convert to time. Anyway, very laid back conservative population here. Very rural. Land is super cheap ($3500-6500 per acre). We built our house for $177k and it's a damn nice place to call home. Here, a $250k house will be a mansion almost. Well, depending on the land associated with it. More acreage = less house. Anyway, it's very dry here, we're in a drought. Not many hills at all. We get a bit more snow and ice here over Austin, but not much more. Still gets damn hot. We saw multiple 110+ days here last year.
Dallas is kind of the middle ground. Dallas ALWAYS gets the rain we want. Dallas has crappy traffic too, but it's to be expected in a large city. I never lived there and don't have much experience to share other than housing is expensive apparently.
Houston... Well, it's hot, it's humid, and it's Houston. Being on the coast makes it cool I guess... Never been a fan of Houston. That's all I got. LOL
Anything more west than me becomes Oil and Wind country. Everyone is into wind power or oil field work. It stinks because of the oil. BALLS ASS HOT!! Dusty, nasty, gross.
Pan handle, flat, dry, oil & wind country. Amarillo... Been there, nothing to see really. Extremely flat and baren landscape.
The further east you go, the taller the trees get and more humid it gets. The further west you go, the more arid and dry it gets and the trees shrink. If you like trees, stay east/northeast Texas. If you like to see ALL the stars in the sky, come out west.
Hope this helps. If and when you get here, PM me and I'll give you my number. We will have to meet up, I'll buy you a beer.