I'm actually giving it some thought, if I can find reasonable accommodations.
My last experience in Toronto was being laid overnight a few years back from an international flight at the airport, with missing bags, yada yada. Let's just say Air Canada left me rather unimpressed with their service, hahah.
Seldom do I have a reason to go up north, and I wouldn't mind seeing TO on better terms than I had on my last time through.
Quebec City is also on my to-do list, though I'll probably wait until winter and hit that along with Mont Tremblant for the skiing.