What makes a good architectural design?

In my point of view, a good architectural design have to be creative, like the picture on the top. The cross-section of the house, as shown above, is creative in a way that when the design thinks: "OMG, i need more space, but building it on top takes too much space and money, so why not use natural foundation?" This kind of under-ground houses that you see above ground is just the tip of the ice-berg, compared to the space underground. However, the flaw is that the residents have to go above ground to get sunlight, and most of their house is lightened by artificial light. Also, in the event of an disaster, the residents living at the bottom floor would have a hard time getting out and risk the roof collapsing on them.

What is Architectural Design?

1) It is a concept that focuses on the components or elements of a-structure or system and unifies them into a coherent and functional whole, according to a particular approach in achieving the objective(s) under the given constraints or limitations.

http://www.businessdictionary.com/definition/architectural-design.html

2) Architecture design the design of the total built environment, from the macro level of town planning, urban design, and landscape to the micro level of furniture and product design.

http://www.bernardmarsonarchitect.com/architectural-design-new-york.htm

the profession of designing buildings, open areas,communities,

and other artificial constructions andenvironments,

usually with some regard to aesthetic effect.

Architecture often includes design or selection of furnishingsand decorations,

supervision of construction work,

and theexamination, restoration, or remodeling of existingbuildings.

http://dictionary.reference.com/browse/architecture