Happy shares none of the poetry that erupts from Biff and that is buried in Willy—he is the stunted incarnation of Willy’s worst traits and the embodiment of the lie of the happy American Dream. As such, Happy is a difficult character with whom to empathize. He is one-dimensional and static throughout the play. His empty vow to avenge Willy’s death by finally “beat[ing] this racket” provides evidence of his critical condition: for Happy, who has lived in the shadow of the inflated expectations of his brother, there is no escape from the Dream’s indoctrinated lies. Happy’s diseased condition is irreparable—he lacks even the tiniest spark of self-knowledge or capacity for self-analysis. He does share Willy’s capacity for self-delusion, trumpeting himself as the assistant buyer at his store, when, in reality, he is only an assistant to the assistant buyer. He does not possess a hint of the latent thirst for knowledge that proves Biff’s salvation. Happy is a doomed, utterly duped figure, destined to be swallowed up by the force of blind ambition that fuels his insatiable sex drive.
Happy might as well be Willy Jr., because this apple hasn't fallen far from the tree. Though he is relatively successful in his job, he has his dad's totally unrealistic self-confidence, and his grand dreams about getting rich quick. Like Biff, but to a lesser extent, Happy has suffered from his father's expectations. Mostly, though, his father doesn't pay that much attention to him. Willy was always a bigger fan of Biff. Happy, maybe because he always felt second best, has more of a desire to please his father. Despite his respectable accomplishments in business, and the many, many notches on his bedpost, Happy is extremely lonely.
Happy is competitive and ambitious, but these feelings are misdirected. Unable to compete on his own terms in the business world, Happy blindly pursues women – taken women – purely for the sake of doing so. Looks like