If you were the director of a production of Macbeth, how would you have Banquo act in scene 3? Remember, he's been having "cursed thoughts" about the prophecies given to him and Macbeth.
What a wonderful opportunity!
In Act I, scene iii, Macbeth and Banquo have just received the original three prophecies from the witches, and later in the act, the first prophecy comes true (Macbeth becomes Thane of Cawdor). What I would want to do as a director is to demonstrate how Macbeth and Banquo are character foils. A character foil is when one character is in stark contrast of another character (usually the protagonist), to highlight their differences. Macbeth and Banquo are both military men of high stature; however, their main difference is how they interpret the prophecies. Macbeth uses the prophecies as a catalyst for obtaining power through means of unchecked ambition; however, Banquo is much more reasonable; Banquo will stop and question whether there is value in working towards the prophecies because he fears that sometimes evil comes dressed as a temptation. They each have many asides here, and this would be a great chance to show how Macbeth begins to become crazed with the idea of power, meanwhile Banquo is much more contemplative and questioning. A logical and hesitant character who questions with subtlety may be the way to go.