I would agree with the other answer that characterizes the three sons seeking revenge as, somewhat as in the children's story of "Goldilocks and the Three Bears," too brash (hard) in the case of Laertes, too thoughtful (soft) in the case of Hamlet , and "just right" in the...
I would agree with the other answer that characterizes the three sons seeking revenge as, somewhat as in the children's story of "Goldilocks and the Three Bears," too brash (hard) in the case of Laertes, too thoughtful (soft) in the case of Hamlet, and "just right" in the case of Fortinbras. As in Macbeth, after a period of corruption and turmoil brought on by regicide, in Hamlet, the rightful leader in the form of Fortinbras gains the throne, leaving the audience reassured that despite the pile of dead bodies on the stage, the world is a safe place in which order triumphs over chaos.
Hamlet is famous for problematizing and interiorizing the revenge play, which was normally an audience-pleasing, fast paced, violent, and bloody genre similar to an action film today. Typically, as in today's actions films, the good guys fought the bad guys. The bad guys violated moral norms, and the good guys sought revenge. Nobody thought much about the nature of revenge itself, as they typically don't in today's action movies. It would be odd, for example, to imagine a Jason Bourne or Rambo-like character stopping in the middle of the movie action to articulate a long contemplation on the nature of revenge, whether or not he is doing the right thing, and its implications for the afterlife while contemplating suicide.
Shakespeare, being Shakespeare, does, however, dwell on the nature of revenge, and uses Hamlet as his mouthpiece to explore its nuances and raise questions about its value. Hamlet really doesn't want to go around cold-bloodedly killing people and is driven almost to suicide by the inner conflict he experiences as a result of the Ghost's demands. He also, as critic Rene Girard points out, brings a Christian worldview into what we might call a pagan or pre-Christian concept of kinship-based honor killing (revenge). Revenge has no place in the supposedly Christian world of Denmark (Hamlet has clearly been raised Christian as he worries about going to Hell), and while Hamlet is not concerned with Christian forgiveness of his enemy, he is preoccupied with the Judeo-Christian concept of justice: he does not want to murder an innocent man.
Laertes, on the other hand, is a more typical revenge hero, bursting in looking for blood to avenge his father's death. Shakespeare shows this not as admirable and heroic, but foolish: because his fury compromises his ability to think straight, Laertes is easily manipulated.
We are left with Fortinbras, who seemingly combines thoughtful good sense with well-planned action. We can feel assured his revenge will bring stability, not destruction, to Denmark.