I totally understand the whole "McMansions are bad architecture" thing... However, something about it really bothers me. There was an episode of 99% Invisible where the guest was talking about their McMansions blog and how it makes fun of these Horrid dwellings. The whole thing stank of classist elitism. The Wrong Type of people were getting the chance to design and build large houses, and of course they're applying…
I propose an experiement to test the elitism hypothesis: Ask a random selection of people to rate various types of houses. If McMansions are rated poorly only by "elites", then the hypothesis is true. If they're rated poorly by everyone, it's false.
Edit: the points below are all fair.