People that are TV ugly are ugly compared to the other celebrities in the cast (often, though, the only difference is that the TV ugly folk are pretty people in disguise, like how Ugly Betty is ugly because she wears glasses and weird sweaters) but real ugly ugly people are not seen on TV, except on newscasts, documentaries, or some talkshows...you see them on the street every day, though, and chances are your friends and family are filled with them, if you're not one yourself.
Translating to buildings, everything on the internet is black or white, and since one shade below perfect must, therefore, be ugly, you end up with people calling Pei's Commerce Court ugly which is, of course, ridiculous, unless you think all boxes are automatically ugly, in which case your opinion doesn't matter.
Saying RoCP or Sheraton or NY Towers or even the Holiday Inn is ugly is saying it's the ugliest celebrity building - TV ugly - but celebrity buildings are just about invariably better looking than other buildings. Archivist already posted a few pics of ugly ugly buildings...they don't represent intangible ugly ideas, they *are* ugly. Ugly ugly. We rarely know their names, though, so they don't make it to the top of the list like the Toronto Star building or the HBC tower does.