Hamlet acts One and Two

By the end of act two Hamlets character has changed exponentially considering how he was at the beginning of act 1. From the calm, collected yet slightly depressed man, he gradually changed into a self loathing, weary man, morbidly dominated by anger.
In act one, Hamlet is depressed over his father's death, or more so that his father has died and is all too soon replaced not just by anyone but buy his own brother. After seeing the ghost of his father and once he hears the tale of how his father died he seems relatively happy to be given the oppertunity to avenge him. However his glee soon changes into obsession for revenge and Hamlet is soon consumed by it.
Hamlet is conserned at first as to whether or not he has actualy seen his fathers ghost or the 'devil in disguise'. He makes a plan to not only act insane but to create a play symbolising his fathers poisoning so that he may see if the new king shows any sign of guilty recollection.
Once the king does flinch at the sight of the play, Hamlet is assured that the gost is real and the king is gilty. The whole essence of this act is a very tragic one indeed, the themes of love, death, hate and guilt are all very strong points that make the play tragic for Hamlet.

In act 2 Hamlet seems to be feeling happier about his secret plot for revenge. However, I feel that Hamlet has become so involved with his plan that he doesn't realise how crazy he is behaving with out meaning to seem insane. Hamlet is so obssesed with his revenge that he is even willing to sacrifice his relationship with Ophelia, he proves this when he denys his actions towards her and tells her to 'go to a nunnery' as he is aware that the king and Polonius are listening in on the conversation. Ophelia has betrayed him unwillingly and although he is clearly upset, as his eyes well-up, he is still intent on the king thinking that he is mad. He also proves he has unwillingly gone mad as he murders Polonius whilst thinking and hopeing it were the king.