I honestly prefer Yorkdale over all the other malls in the GTA. It might even be better than Eaton Centre in terms of cleanliness and distribution of crowds. Sure, it's considered a high end mall with Holt Renfrew and recently opened Nordstrom as the main flagships, but the mall also has a wide range of shopping options that fit within a broader price range.
Also, if you have ever had to deal with the atrocity that is parking at shopping malls, then you will appreciate the indoor parking lots at Yorkdale. Not only are they heated, but they've also got those indicator lights to show whether a spot is open or not so you don't have to drive in circles trying to find a spot.