Type of milk: Cheese always starts with milk, but the animal it comes from can make a profound difference on its final flavor. Cow's milk is the mildest, with a creamy, sweet flavor that translates into a more subtle base flavor in the cheese, so aging and ripening play a prominent role in the development of flavor in these cheeses. Sheep's milk has a mild grassy flavor with a tangier backbone and less buttery sweetness than cow's milk. Goat's milk is the gamiest of all, with a definite hay/barnyard funk to it.