Any circuit that goes directly from the fixture to the breaker panel. For dedicated outlets, isolated fixtures and high-load items, you would want them to be on their own breakers. Those would get a home run, a line that goes all the way back without stopping.
Dryer, stove, dedicated microwave oven outlet, built-in electrical heaters or outlets intended for air conditioners, refrigerators. Water heaters, central heat & air systems, etc. Large appliances/equipment