I'm from Houston and living in UK past 12 years. Lots and lots of amazing things about Houston!!! Low cost of living, you can get a huge house on lots of land for super cheap. I had a 6 bedroom 6 bath home on the water with 8 acres of land with built in pool and barn/stables that I purchased for $118,000 USD.
Great schools with lots of after school programs. Houston has lots of holiday programs such as free tennis lessons for kids in the Summer and because of the warmer weather, lots of great outdoor events year round.
Houston Rodeo is amazing and every year an incredible array of musical acts. You will find sporting events so affordable with specials such as a family of 4 to baseball games for $10.00.
Food is beyond cheap with year round fresh fruit and veggies coming from Mexico. You will have to get used to having an abundance of buffets with so much choice and customer service like you have never seen in the UK.
The only downside would be the huge change in weather as it's hot and humid a large portion of the year but if you grew up there, you are used to adjusting to it and it will take some lifestyle changes.
For me it was doing a lot of grocery shopping late when it was cooler and we always ate dinner later with more salads and the BBQ going year round.
It's more of a 24 hour city and you will be surprised to find that in Walmart that even the bank inside them are open 7 days a week and later hours like open until 9PM so you can get so much more done without rushing around after work.
Traffic will be a shock as no matter how many lanes the freeways are, at rush hour they come to a standstill but we have toll roads and so much worth the little cost. You must, must, must drive as limited public transportation unless it's downtown.
World class medical and you will find for most minor emergencies that we have 24 hour walk in clinics everywhere.
People are uber friendly and helpful and don't be surprised if you pull out a map if you have several people offering to drive there so you can follow them, and then invite you over for a BBQ :)
Good luck and if I was able, I would move back to Houston in a heartbeat.