For me at the moment, it's:

Ann Taylor: Crazy extra shipping costs to Alaska
Zara: Can't find the right fit in anything
Asos: Too much temptation, too little success (though I can't help it)
Boden: Love their stuff but not my style and too afraid I'll cave in
Anthropologie: Unless they offer free shipping deals

I don't even click on pop-ups for these places, no matter how tempting!