I love how exposed coaster tracks is always immediately associated with Six Flags. Six Flags is so much more than exposed roller coaster tracks...
You've got rides built on parking lots, ads for cell phone companies plastered everywhere, vomit inducing chili dogs, the latest rap hits, walls covered in gum, carnival rides, rude employees... Sounds like fun!
Honestly, there are tons of gorgeous roller coasters in the world, WITH exposed tracks. You don't have to theme every inch of track to make it a great experience. It's the way the coaster interacts with it's surroundings, the way the coaster symbolizes something greater (Hulk, Dragons, Loch Ness Monster). Hulk is certainly a very iconic and photogenic roller coaster. It's the way that it fits in with it's surroundings... The way that you can hear the roar throughout the park, the massive inversions over the lagoon, the gamma ray accelerator, etc.
YOU are a part of the Hulk. The coaster symbolizes the Hulk. Loud, dominating, scary. And don't try to argue with me about how Big Thunder or Mummy or Everest are better themed, because I know that they are. It isn't the point I'm trying to make...