In loads of fics on this site, whenever nobility or Canterlot high society are involved, they are invariably unicorns, presenting unicorns as the snooty upper class. However, watching some of the Canterlot episodes, such as 'Sweet and Elite', I noticed that there are actually a good number of these nobility/high society ponies who are, in fact Earth Ponies or Pegasi - so the common presentation of unicorns as the snooty upper class is completely wrong. Isn't that interesting?