King Duncan was a good leader because he respectd his people and would do his best to help them if they were in need. Hes very decisive and kept his word. One of the he was talking to his cousin Malcom and said that he will be forever in his debt but that he would always be willing to help when he is in need. One of his quotes was "You can never tell a mans face whats going on in his mind. I trusted him completly. And then another place was when he was going to get killed but people were standing up for him saying he should not get killed due to good leadership and worthiness.
2. I think that Machiavelli would respect the honor and leadership of him. Because Macbeth has ways of making people do the hard work for him which could make Machiavelli more appreciative of him. One of the quotes from Machiavelli is "If you want something let nothing stand in your way" and Machiavelli would like that. He was worthy for his people.