The second answer! It creates an engaging sound effect :)
He is presented as a loyal and heroic warrior who had no apparent lust for power. However, the flames of ambition could be seen when he uttered "tell me more" after the witches prophecy. The prophecy, however, is half finished and he is responsible for finishing it off himself. Thus, the main plot is set in motion and is a chilling foreshadowing of the influence of power and the corruption it has, even on a "good" person like Macbeth. Macbeth is seriously conflicted between a number of possibilities. He seriously considers letting fate take its course ("If chance would have me king, why then let chance crown me."), taking agressive action ("Prince of Cumberland! That is a step on which I must fall down or else o'erleap for in my way it lies."), and doing nothing and disregarding the prophecy ("We shall proceed no further in this business.") What drives him to commit the murder is not "vaulting ambition" but his fear that his wife will consider him less than manly.
In the first lines of the play, they are referred to as the "star-crossed lovers," meaning they were fated to meet and fall helplessly in love. And the action he creates transpires over a handful of days; at the end of these few days, Romeo and Juliet are willing to die for each other. Thus, there does seem to be some credence for the "love at first sight" analysis.
Romeo certainly proclaims his love for Juliet as soon as he beholds her:
Did my heart love till now? Forswear it, sight!
For I ne’er saw true beauty till this night.
He immediately forgets his misery over Rosaline, which has plagued him for the entire play thus far, and becomes much more hopeful with this immediate change in demeanor. When he finds out that Juliet is a Capulet, he bemoans, "My life is my foe’s debt"
