As previous posts have mentioned, Macbeth has something for everyone! It is a very assessable play because it ultimately asks the audience "what influences you and to what degree?" Everyone has a character or a circumstance in the play that they can make a direct correlation to: have you ever been talked into something? have you ever wanted something that wasn't yours? have you ever felt so guilty you couldn't control it? have you ever regretted your actions but had no easy way to reverse the course of events? Most people can relate to these themes, and therefore the play is very interesting.
We have the supernatural elements of the witches, great battles, passionate relationships, murder, jealousy, ambition, violence and death. We still use many of these elements to create exciting stories today. Think of our obsession with detactive shows, competition and of course 'true-life dramas' (the story of Macbeth is loosely based in historical fact) and you see that Shakespeare hit on a formula for entertainment which we are still captivated by.
With the elements of the preternatural world, unsexing, treachery, murder, suicide, and insanity how can Macbeth not interesting? Added to all this, Shakespeare's tragedy is based upon historical characters. Hollywood should do so well!
I think that Macbeth is interesting because it brings out some of the themes that intrigues readers today: murder, darkness, power, and witchcraft. These themes are relevant today- think Harry Potter or The Twilight Saga. While Shakespeare wrote Macbeth in the early 1600s, it still speaks to active readers, while at the same time, and those not so interested given the themes of the play.
Also, it makes us look at the issues of ambition and morality. We have to think about how a person can be both ambitious (which is not necessarily a bad thing) and moral at the same time. Macbeth allows his ambition to take over and loses his morality. Why does this happen? Is it inevitable? Is Macbeth a bad person? Is it his wife's fault that he lets his ambition take over?
All of these questions present themselves to us. This play is interesting because it forces us to think about these issues and to try to apply them to our own lives.
Macbeth is basically a conscientious man but he has been overpowered by his vaulting ambition. We see here the tragedy of a man who views his own degeneration. From a noble and great warrior he degenerates into a mere killer who commits murders after murders to save himself from the results of his heinuous crimes.However all along he holds our sympathy as we witness the fall of a great man.He is aware of his doom from the moment he kills Duncan.He is aware of the futility of his consequetive actions. For the first time Shakespeare made a hero out of a villian.Macbeth's soliloquies like "If it's done when it was done...'show the revolting conscience of a man committing murders.It is this which prevents Macbeth from sinking to the status of a mere villian. so its a great tragedy written in a different vien.