2. What do you think about the character of Macbeth? Was he a good guy before he met the witches..

I think Macbeth was a just normal person before he met the witches. I think most people in this world have ambition and want to satisfy them by achieving their dreams. We all are capable of dark deeds, too because we are human beings. However, everyone has different cut line for their reactions in achieving their ambition. Everyone has different limits for their level of morality and integrity.
I think Macbeth had just as the same ambition as others but was not fully moral and faithful. Macbeth is like a bomb which is perfectly safe until it’s ignited. In fact, Macbeth didn’t really think about having a greater power or being a king before he meets the three witches and even after he after until Lady Macbeth tells him to kill Duncan. The prophecy from the witches and the encouragement of Lady Macbeth spark the light in Macbeth’s heart. These two events make Macbeth to commit dark deeds.
I think Macbeth is to blame for his actions because his limit of achieving his ambition was immoral. Witches also prophesize Banquo that his son will be the king, but Banquo draws a line right away and remains loyal to his king. It was possible for Macbeth to be like Banquo, but he chose to achieve his ambition by doing wrong deeds.