Texas isn't really as bad as it can seem. When I was 15 my parents did the same thing, sold our house in california when I was halfway through high school and brought us out here.
I can't say I know too much about frisco, except that they've got a pretty good mall.
SFOT, on the other hand... before I started working out there I was there every week for the rides. Freeze is my favorite. but as long as you don't overdo them, most of the other rides are really good too.
And don't miss out on the shows. Coobrila (cirque type show) is back this summer, and there are always good shows at the Southern Palace Theatre during fright fest and holiday in the park.
The DFW area really is a great place to live. You get two different "down-town" areas you can go to. Dallas has the American Airlines Center as mentioned before, Music Hall, the state fair in october, and some pretty cool night-life stuff. Fort Worth has Bass Hall, one of the top zoos in the country, and the imax omni theater.