Every city in Texas is different, it's difficult to generalize. Your list leaves out Fort Worth, which might as well be a different country than Dallas. DFW is a Metro not a city. Also, the fastest growing cities are in DFW -- Frisco and McKinney in particular, but also Fort Worth.
Austin is all the failed people from Brooklyn and LA basically. It does not have a Texas vibe as far as I'm concerned.
I lump FW in with DFW, like everyone does, but you are right it is different. Not that much of a fan of Frisco or really North Dallas at all. 100% agree about ATX being where the failed NY and CA millenials go. lol