This is obviously more of a culture and personal prejudice than anything more universal. If you want to talk about 'Cookie Cutter' neighbourhoods, you should take a look at footprint and layouts of the Semis in Riverdale/Leaside, or perhaps the large homes by Roncesvalles/ highpark. They where all once large development 'cookie cutter' homes. It's taken generations (literally) by way of different owners contributing their own uniqueness that's given the neighbourhood their so called 'charm'. Give the burbs a few generations, and you'll see the same unique and charm.
Try growing up in a urban center like Singapore, India, China, or even Rome where it's trully dense urban living, and you'll understand why there are plenty of people that want the a detached home with a backyard.