John Hancock Bldg more iconic?

I've always wondered, despite the Sears Tower being the tallest building, why is the John Hancock building the most iconic building in Chicago? I see the JH building far more, or far more prominently on TV shows, magazines, postcards...even Chicago's 2016 Olympic bid logo prominently displays the building depicted in the torch flame. Is there some copyright rule that restricts the Sears Tower from being depicted more often? The two buildings aren't that far apart in age so it's not like the Empire State Building's icon status in NYC (Pre-9/11), having stood for so long.>