Character of Macbeth

Macbeth will absolutely be the main character in the story, seeing as the title of the play is indeed Macbeth!  From reading the first act, I am getting a sense that he is an extremely determined and skilled man who may be at a glance very sure of himself and stable.  I say this because before even meeting with the witches, Macbeth is able to lead an army of Scottish to prevail against a group of Irish invaders.

"Till he unseamed him from the nave to th' chops,

And fixed his head upon our battlements." (22-23)

So far, I am impressed by the Macbeth's accomplishments and bravery.  However, I am predicting that Macbeth will become greedy once he knows that he may become King.  I believe that he will not stay true to himself and let his obsession with power overcome his morals.

Macbeth is a true warrior on the battlefield but when it comes to the prophecy given to him by the witches, he becomes concerned and powerless.  Though already happy about being promoted to Thane of Gladis and Cawdaor, Macbeth is presented with the possibility of him becoming King of Scotland.  I believe Act 1 of the play was helpful to set the tone and setting of the story; dark, peculiar and magical.  As the play develops, I believe there will be much conflict between Macbeth's reign as King and that there will be significant changes in his character because of his new power.   Perhaps the witches will return as either antagonists or protagonists in the story. 

Here is an amusing link of someone trying to explain the play in less than 96 seconds...I do not recommend using this!

http://www.youtube.com/watch?v=F5nlx2XzP-4&noredirect=1