I agree that Fett going out like a punk in ROTJ really diminished him, but the PT was another reason why knowing more about a character doesn't necessarily make it more interesting.

Boba Fett, The fate of Luke & Leias mom, The Duel, The Emperor, The Clone Wars, and the character of Anakin Skywalker is one reason why I now look back and wish the prequels were never made. Everyone one of those things I just named to me were underwhelming. It is my fault cause I wanted them before 1999, but the mystery of all these characters, and just the total mystique of what you 'thought' about each character made them more interesting than really seeing it on screen for three more movies.