They both make the top 25 of 100 towns listed. I don’t know much about Keller (No. 7), other than I like their hamburgers. Apparently it has “which boasts immaculate parks and a spanking-new town center,” which sounds sweet. Mansfield (No. 24), I hear from friends, is quite the rock and roll town. And the web site agrees:
It [Mansfield] hosts an annual art fair, music festival, and holiday parade; it’s also the home of the Hawaiian Falls water park and Big League Dreams ballpark.