The lack of balance, proportion, controlling lines[1] and symmetry are all bad aspects of nearly all modern (in the chronological sense) architecture, not simply McMansions.
My primary issue with McMansions specifically (beyond the fact that they lost the thread on western architecture, which should be blamed on the academy[2]) is that the materials and workmanship are terrible: ugly gaps, quick to stain stuccos and metals, slapdash construction and very little craftsmanship. The flip culture that the mortgage-debt bubble of the last 15 years created has exacerbated this issue to almost comical levels.
EDIT: After reading another post[a] of his, it is worth mentioning another chronic problem with modern (again chronological, not stylistic) building: the buildings often look like they are about to fall over. A particular pet peeve of mine is the flashing gap found at the base of many houses and buildings, which introduces a disconcerting negative gap right where a soothing, wide foundation should be. Visual insanity.
My primary issue with McMansions specifically (beyond the fact that they lost the thread on western architecture, which should be blamed on the academy[2]) is that the materials and workmanship are terrible: ugly gaps, quick to stain stuccos and metals, slapdash construction and very little craftsmanship. The flip culture that the mortgage-debt bubble of the last 15 years created has exacerbated this issue to almost comical levels.
[1] - https://www.amazon.com/Old-Way-Seeing-Architecture-Magic/dp/...
[2] - https://www.amazon.com/Bauhaus-Our-House-Tom-Wolfe/dp/031242...
EDIT: After reading another post[a] of his, it is worth mentioning another chronic problem with modern (again chronological, not stylistic) building: the buildings often look like they are about to fall over. A particular pet peeve of mine is the flashing gap found at the base of many houses and buildings, which introduces a disconcerting negative gap right where a soothing, wide foundation should be. Visual insanity.
[a] - http://mcmansionhell.tumblr.com/post/148935246684/mcmansions...