And when I say this, I also have in mind other kinds of design, from cars, furniture, shampoo plastic bottles, fonts and GUIs. If any shape is possible, aesthetics usually goes down the drain.
In the particular case of buildings, these are made to last and have an imposing quality of their own, given their size and location. And famous architects have an visionary aura that only adds to the disappointment and dismay of the common citizens that will have to live in the shadow of those behemoths, whether they like it or not.