As a sailor, one of the things I like about the Airstream is that it doesn't try to be something it is not. Just like a well designed boat that instantly turns heads and nods of appreciation, so does an Airstream. Because of its sleek aeronautic design, even the untrained eye senses that it is meant to travel over the road in a efficient manner. The interior design is both functional and comfortable.
Unlike many mega-5th wheels and motor-homes, the interior design does not try to deceive the occupants that they are in an opulent mansion complete with fireplace and even chandelier. When I am on a boat or in my trailer, I want to experience and enjoy if for what it is.
I enjoy being required to think about how much stuff I can take along or how much energy and water I consume, and how much trash I produce. This exercise helps me carry that thinking with me when I return "home".