From a purely functional perspective, complex roof lines and the multiplication of volumes suck for durability and energy use. The more complex the roof, the mo

From a purely functional perspective, complex roof lines and the multiplication of volumes suck for durability and energy use. The more complex the roof, the more vulnerable areas it contains. The more edges and transitions you have, the harder it is to properly flash and air seal the enclosure. And huge voids suck too: windows have poor thermal resistance and large glazed areas mean overheating due to the sun's radiation. Add cheap material and poor construction practices (the famed "ductopus" is often found in million dollar homes) and you get crap housing, even without taking aesthetics into account.