Nobody likes to get ignored. It is not a good feeling. It makes us feel non important and unwanted. And dogs feel exactly the same thing as we do when they are ignored.
In the video below, Dinky, the great dane, waits for his owner to give him some attention. But he gets impatient when the owner only gives attention to his brother, Ro-Ro.
To make him notice, Dinky gets a extremly funny rage attack that continues to a very interesting conversation between him and his owner.