None, I hate shopping.
But my least hated mall would be the downtown underground mall, Les Cours Mont-royal, eaton centre, cathedrale, les ailes, etc. Mainly because it's indoors and takes me 5 minutes to get there from my house via metro.
I hate the new strip malls, it's a good concept for warm climates, but half the year it's freaking freezing outside. You have to drive and look for parking each time you wanna change stores. IMO it's a retarded idea, but they are still booming everywhere!