Answer:
Curley is a very aggressive and violent character. He is the Boss's son and takes advantage of the power that he has over the other men on the ranch to treat them cruelly and pick fights. He is physically small and so is resentful of bigger men and picks a fight with Lennie because of this.
Explanation:
Honestly, I don't think Daisy will end up with Tom or Gatsby. Each of them has a flaw that just cannot be ignored enough in a relationship. Tom is too controlling, which is hardly even a relationship at all, and Gatsby, despite his sweetness to her opposite of Tom, wants to do something even more impossible: relive the past, as if the past is a swimming pool to jump harmlessly right back in. What Gatsby is deluding is too good to be true and Tom's personality is too poor to be true, which is why that infatuation will not last very long either.