I kind of like the McMansion property of looking like the house was built piecewise. It's a little endearing, I find. Actually, Castle Neuschwanstein was built that way - it was all built in one go with modern techniques but has a lot of different submasses. But I have to say the execution is often lacking. Proportions have never been the strong suit of evolved buildings, but there's an obsession with traditional markers of wealth (roman columns, etc) that don't really work when you don't have the money to build the other things equally large.