There are three reasons.
"Romance of the Three Kingdoms" and "Water Margin" are one of the four famous works in China, which have a very high popularity in the folk, and those famous characters among them are widely praised and liked by the audience, but when evaluating the characters in these two famous books, we will find a particularly strange place, that is, when we evaluate the characters of the Three Kingdoms, we will always evaluate them as heroes, and when evaluating the characters of the Water Margin, we will evaluate them as good men, why is this? Why not evaluate the characters of the Three Kingdoms as good men, and not the characters of the Water Margin as heroes?

In fact, there are three main reasons why these two very different evaluations appear!
First, the behavior of the characters of the Three Kingdoms and the characters of the Water Margin is very different
In the public's impression, "good man" refers to brave and strong people, this interpretation is more positive, but in addition to this positive explanation, "good man" actually has the meaning of robber, which is more negative, so the word "good man" actually has the meaning of good and evil, mainly depends on how you understand. The word "hero" mainly refers to the more talented and courageous people, selfless and selfless, tireless and brave people, it can be said that the word "hero" is a typical positive word! It is precisely because the words "good man" and "hero" are different in interpretation that they are used to refer to the Water Margin characters and the Three Kingdoms characters respectively, because the behavior of these two groups of characters is very different!
Although their encounters in the Liangshan good men in the Water Margin are sympathetic, especially in the TV series of "Water Margin", they have become typical tragic heroes and elevated their status in the hearts of the people. But in fact, in the original work, the image of a good man in Liangshan is not very positive! Although many of the good men in Liangshan were oppressed by the imperial court and forced to embark on the road of no return, there are also many people who are themselves adulterers, and they are not good people themselves.
Li Kui, a thick man known to everyone, is a typical bully who is afraid of hardness in the original work, and he also likes to kill innocents indiscriminately, regards human life as grass, to tell the truth, he is a demonic existence, where can he be considered a good man? And there are not many people like Li Kui who kill indiscriminately, so these people can only be called good men, because one of the good men means robbers, and the people in Liangshan are robbers themselves! That's not a good word!
On the other hand, the characters of the Three Kingdoms, their personal conduct is much better than that of the people in Liangshan, at least many of them, the purpose of joining the army at the beginning was to serve the country and save the people of Li from water and fire, not to covet personal pleasures, which is a big difference between them and the people in Liangshan, typical of Liu Bei, Guan Yu, and Zhang Fei. At that time, they were ordinary people themselves, and they could live a peaceful birthday, but in order to fight against the Yellow Turban Army, for the Kuang Fu Han Room, they came together and composed a legend, which is what a hero should do!
Second, the pattern is different
The characters of the Three Kingdoms fought and died and fought each other, but their ultimate goal was actually to unify the world and give the people of the world a peaceful and prosperous world. As for the Liangshan characters, they fought and killed in order to covet pleasure and to oppose the imperial court. Comparing the goals of the two, you will find that the pattern of these two sides is completely different, it is obvious that the pattern of the three kingdoms is larger, they are from the perspective of the world to consider the problem, this kind of person deserves the title of hero! The people in Liangshan did not stand in the perspective of the world, did not consider the problem from the perspective of the people of Limin, but only stood in Liangshan to think by themselves, and the pattern was too small in comparison.
Third, the moral standards are different
In the Romance of the Three Kingdoms, although the emperors of the Eastern Han Dynasty still exist, but the Eastern Han Dynasty has already existed in name only, judging from the moral level, the behavior of the characters of the Three Kingdoms is actually understandable, after all, the Eastern Han Dynasty has ended, their behavior is not a rebellion, on the contrary, they are still making efforts to unify the world. And in the Water Margin, the powerful Northern Song Dynasty court still exists, the world has not fallen apart, the behavior of the people of Liangshan is rebellion, this behavior in the eyes of China's traditional values, is very rebellious, so it is impossible to use the word "hero" to describe those characters in Liangshan, at most use the word "good man", it is sympathetic to their suffering, but it is not encouraged!
epilogue
On the whole, the reason why the characters of the Three Kingdoms are called heroes and the characters of the Water Margin are called good men is mainly for three reasons! First, the behavior of the characters of the Three Kingdoms and the characters of the Water Margin is very different, the behavior of the characters of the Three Kingdoms is even more honorable, their purpose is to serve the country and save the people from water and fire, and the Characters of the Water Margin covet pleasure and regard the people as grass and mustard! Second, the character pattern of the two sides is different, the three kingdoms figures are from the perspective of the world to consider the problem, is to compete for the world, while the Liangshan characters only stand in their own way to see the problem, not focus on the world. Third, the moral standards are different, the three kingdoms of the melee, occurred at the time of the collapse of the Han Dynasty, and the Liangshan rebellion, which occurred at the time of the unification of the Northern Song Dynasty, the moral evaluation faced by the two sides was different! What do you think about that? Welcome to leave a message to discuss!
(This article mainly refers to "Water Margin")