Donald Duck (full name: Donald Fauntleroy Duck) is a character created by Walt Disney. He is a white duck with a yellow-orange bill, legs, and feet. He usually wears a sailor shirt, cap and a red or black bow tie, but no trousers at all. He is presented as a best friend of Mickey Mouse, who he sometimes envies.
Known for having a fiery temper, humorous (yet distinctive) "duck" voice and mannerisms and having appeared in cartoons, films, video games, comic books and more, Donald is one of the most iconic Disney characters of all time, as well as among the most popular.
Donald's most famous personality trait is his uncontrollable temper. This has gotten him into some tight spots with his relationship with Daisy (GC5CQ1W), as she is easily annoyed by his constant anger issues. However, things always turn out right in the end. Donald's jealousy towards Mickey's popularity sometimes gets in the way of their friendship and causes him to almost be a villain at times because of his angry temper. Although Donald can be loud, rude and selfish, he is extremely loyal and will do anything to help a friend in need. Donald also has an obsession over being Disney's most famous and popular star and also obsessed with money, treasure, gold, etc., which he gets from his Uncle Scrooge (GC4NTKK), and can sometimes be found participating in a get-rich-quick scheme.
Donald's aggressive nature is a double-edged sword however, and while it at times is a hindrance and even a handicap for him, it has also helped him in times of need. When faced against a threat of some kind, Donald may get frightened and even intimidated (mostly by his nemesis Pete), but rather than getting scared, he gets mad and has taken up fights with ghosts, sharks, mountain goats and even the forces of nature. And, more often than not, Donald has come out on top.
In spite of the negativity, Donald is a generally easy going person. Most of his cartoons start with Donald relaxing, enjoying an activity, or simply not having a care in the world until something or someone comes along and ruins it, resulting in the duck exploding in rage. When not dealing with his scenes, Donald can often be found snoozing in his hammock.
Donald has also been shown to be a bit of a show-off (especially towards his nephews). He likes to brag, especially when he is very skilled at something. This has a tendency to get him into trouble, however, as he also tends to get in over his head. In spite of their rivalries, Donald shares a very loving relationship with his nephews and treats them as his own children. They obviously love their "Unca Donald" with a particular scene in the first episode of DuckTales showcasing them having a heartfelt goodbye moment as Donald prepares to leave for the navy.
Reference: http://disney.wikia.com/wiki/Donald_Duck