Hero is a person who is admired for his courage, noble character and terrific achievements whereas a villain is a person with evil motives and the one who does bad things. Visualize a scene in a movie or novel and try to study characteristic feature of hero and villain. Here are a couple of points that differentiate a hero from a villain.
Romance: Villains frequently have hidden motives and improper means (like sabotaging competitors). True romance is uncommon for villains and can make them deeper and more interesting.
Revenge: It might be heroic if the crime is particularly odious and/or the system is not keen or able to resolve the situation. It might be villainous if the character overreacts or is not being careful enough about catching only the people responsible. While making revenge plots, it’s usually more appealing if the revenge matures into something more than just assassinating.
To set one apart: It depends as to why the character wants to set him apart. A hero whose chief aim is to achieve fame/success will almost certainly gain a more significant goal over the course of the story. Whereas a villain might not follow this just as a hero does.
To get acceptance: Many heroes seek to gain the respect of their subordinates; on the other hand, getting acceptance may be more ominous based on who playing the central character wants to make an impression and/or what will impress them.
Justice: Justice is quiet similar to revenge but the only thing is it is less lethal and targeted more carefully against the right targets. Nonetheless, justice can sometimes be villainous.
Greed: Though sensible, greed is the inspiration that tends to be used in a one-dimensional way. To understand this in detail, the character may be hiding something (money, authority) on behalf of somebody else. Also, it’s cliché for villians to be sort of voracious
Fear: The feeling of fear is multifaceted. It can be used by both heroes to combat villains and in certain cases villain can use it for suppressing the soft targets like heroines. Fearful heroes typically recognize intimidation that is contemporary rather than possible, but this can lead to suspicion in the minds of the audience.
Desperation: Desperation as a virtue belongs to the villain. Villain is driven by the motive of greed that converts itself into desperation. The very nature of heroes keeps desperation at bay as they are equipped with everything needed. Desperation leads to conflict and as we all know villains are not away from conflicts either.
Social cohesion: Heroes are more inclined to fall for Social Cohesion. It literally means keeping all the key characters together. This might not be applicable to villains, as villains are not loyal to anyone in general. Therefore the question of imposing social cohesion doesn’t arise.
Curiosity/Quest for Knowledge: A hero making an attempt to understand things around him may sound a little strange, as if he is some kind of wanderer, etc. Whereas a villain is almost certainly be discovering the surreptitious things better.