Everyone has an opinion. I grew up in Houston, lived in Lubbock for two years, lived in Austin for 3 years, and Dallas for 1 year while spending half my time in Fort Worth. I now live in New York City. So, I think I can give a somewhat level opinion of Houston.
Houston, is nice. It is pretty hot but how much time are you going to spend outside the A/C. In all honesty, how much extra time do you plan on having during peds? If you run, then Memorial park is the place to live by. It's still the best place to Run. Town Lake in Austin is nice, but it doesn't have the heat that grinds on your system that Houston does. I like the grind.
If you Mt. Bike, then it's a toss up. Do you like gnarly single track in the middle of dense woods with 60 foot down hills that turn and slide mid way down and are littered with giant fallen oaks that require hopping or ducking ability? Highly technical stuff. That's Houston's Ho Chi Men <sp> trail, which is also in Memorial Park. I like technical but with plenty of soft stuff to crash into if I happen to lose my way. Austin, offers not so technical trails in the Green Belt and its obstacles tend to be giant bolders or large rocks. The up side is that the trails primarily parallel the river and if it's early in the season there's plenty of water to splash around in for a quick or extended cool down.
If you swim, there are plenty of places in Houston, but I never found fresh water like Barton Springs. Austin also has the only state funded Nude Beach, the name of which popped out of my mind. Too much studying.
If you want to climb Houston has a few climbing walls but it's basically a flat place other than the trails around Memorial Park. Austin on the other hand has rolling hills that offer real life climbing (not restricted to boldering) all along the green belt.
If you like water: Houston has Galveston just an hour away. It also has Lake Conroe and Lake Livingston that are within an hour to an hour and a half. Austin has Lake Travis and then there is Lake LBJ, which is just up a Damn from Lake Travis. Travis floods, but LBJ doesn't. LBJ is a constant level / constant flow lake. That means they manage the water level in real time by playing with the in and outflow at either end of the lake via damns. Pretty nifty set up.
Doh, I forgot to mention Dallas and Fort Worth. Dallas equivalent to Memorial Park and the Green Belt is White Rock Lake. It's nice but from my point of view it's just not the same as Austin and Houston. Plus, it's rather far away from most of the rotations in Dallas. On the Fort Worth Side of things. . . . Oh yeah, there is an equivalent to Memorial Park in a suburb called Arlington Park. It has by far the best routes for roller blading but that's about it.
The nightlife is probably about the same in Austin or Houston. Sorry, but the Dallas / Fort Worth Night life isn't up to Austin's or Houston?s night life. You do need to know where to go though. It shifts in Houston. When I was there, it was on Richmond. Or, if you happened to be gay and wanted a strictly gay bar then it was in Montrose. If you wanted a nice after hours bar for a romantic moment then it was Mar Frelas <sp> over by River Oaks. Austin on the other hand has 6th street, which includes 4th street bars. This is a dense population of clubs, bars, bars, did I say places to drink? That's about it. It's so densely populated that the police have to block the street at both ends. It's fun but for many people it can get old relatively quickly. Houston on the other hand has several pockets of bars. This affords the drunkard I mean med student the opportunity to drive from watering hole to watering hole. Not recommended just noted.
Housing: Austin is the most expensive. It's also the most picturesque. Houston is a close second though and if you are thinking of living in West U then it might even top many parts of Austin. There are other areas though. I would recommend staying away from the Astrodome area. Nasty. There are relatively new communities in what is being called midtown though. Very nice and convenient to the medical center. It's about a mile up Fannin from the Medical Center. Then there's an area around Montrose and not Memorial Drive but the other road that parallels it. Argh, can't remember. . . Allen Parkway. . . that's nice too. Any of the apartments between Richmond Westheimer, Shepherd, and Montrose are very nice and probably less expensive than West U. Plus, they are close to the Houston Med Center.
As far as rotations in the med center go, check scutworks.com. You might find what you are looking for there.
Don't forget San Antonio, Galveston, and Corpus Christi. Lubbock is nice, but small, I found that I liked having more people crammed into a square mile than Lubbock offered.
NYC is pretty nice too. I will probably come back to Houston though. It has so many great things. Memorial park, Herman Park, the Zoo, Enron. . . what else could anyone ask for. :wink: