Both of the Fett's are just the ideal imbodyment of the Capitalist economic system. He is only trying to make a living doing what he does best, and overall it is "for the good of the Galaxy," someone has to the dirty work right? And as far as his personality changes from "get im dad" to ruthless bounty hunter, I think it all has to do with the scene where he's on his knees holding his father's helmet, after Mace Windu decapitated him. That's the moment that the galaxy's greatest and most feared bounty hunter is born. I mean he had no mother and all of Jango's relatives were murdered, he was left alone, and trained in the mandalorian ways, he took up his fathers armor and did what he was spawned for: continuing Jango's Legacy.