Depending on the breed dog training can be easier or harder. That said, lists of breeds that are easy to train, and hard to train are just generalizations, although they can be a helpful guide.
Above all, dogs, like people, are individuals. You may find stubborn individual dogs in a breed that is supposedly includes easy to train dogs, and wonderful, easy to train dogs in a breed that is supposedly difficult to train. Training dog breeds is not an exact science, and easy to train dogs come from every breed.
For the most part, the list below describes a dog as easy to train based on the ability to learn basic obedience training with a minimum or stubbornness or aggressiveness. However, for all breeds, dog training can sometimes be a challenge – even breeds that are supposedly contain easy to train dogs. For every breed dog training can have challenges.