My go-to place for dumplings in Toronto. In my opinion, they have the best dumplings in town. I've tried Mother's Dumplings, Dumpling King and Northern Dumpling Kitchen but I always end up going back to Dumpling House.
Unfortunately, I no longer live in Toronto so I try to get my fix every time i'm back in town, My favorite are the pan-fried ones. Greasy but oh so good. Crispy on the outside and juicy on the inside. Like others have mentioned, my go-to are the pork and chive stuffed dumplings. The pan-fried textural aspect set them apart from others.
The boiled ones are very good too. The flavors are more subtle and the stuffing ingredients can really be appreciated. Make sure you eat them while they're still hot though, since the wrapping can quickly become hard and doughy.
Sticking with dumplings is the best idea. I find their noodle dishes to be on the sweeter side and geared towards more "Westernized" tastes. However, they also have some quality non-dumpling dishes such as the cucumber & garlic salad, marinated jellyfish salad and their fish-fragrant eggplant dish.