Another idea, it may not be broad but one I think would be fun, is "curb appeal" for attractions.
Examples, what attractions look the best/worst from the outside.
Some in my opinion: Spaceship Earth (Obviously), Haunted Mansion, All the Magic Kingdom Mountains, Flight of Passage, Everest, Tower of Terror, Tough to be a bug, American Adventure
A worst example would be Imagination at Epcot.