Don't compare your Great Dane with any other dog. Physically, Great Danes are huge. At times, they act like any other smaller lap dogs. What makes them very lovable is that they have several pleasant characteristics. They can be obedient provided that you equip them with the appropriate dog training.
The Great Dane is full of courage and spirit. This breed needs to be surrounded by people so you should teach him how to behave accordingly. He can be both a guard dog and a domestic pet. His behavior ranges from being pretty quiet and laid back but can turn into a bull whenever he needs to protect you. Thus, it is your responsibility to train him.