Houston - Faculty and students were very friendly, TMC is very nice, the surroundings seem safe, and so far it's been my favorite.
Dallas - I didn't like it. The students didn't seem too enthusiastic, I practically had to sprint during the tour and our tourguide was not knowledgeable at all, and I don't like the bell curve. However, I think the actual interviews were probably my best out of all so far.
San Antonio - Medical facilities are excellent, plenty of opportunities to do rotations down in the Valley, students and faculty seemed friendly. I like the city since I've lived here almost all my life so maybe I'm biased. It's a really cool place to live.
Galveston - I agree, the interviews were weird. They didn't provide enough information about the hospitals so I'm also clueless about the quality of the rotations. It looks like they have plenty of standardized patient contact and the USMLE scores are excellent there so the PBL system must be working. However, I also found the overall experience a little disappointing.