I think what he accomplished, especially in his earlier years, was awesome...the man? Less so. Although, several hundred years from now, some nationalist may see Hitler as a bastion of racial integrity and consider what he did to the Jews as unfortunate, but effective as well...I did some reading up on Adolf some years back as I was interested in what drove a man to commit such acts. He was intelligent, charismatic, had a soft spot for a certain fraulein - take away the Holocaust and he doesn't sound so bad, in fact. Both men were products of their respective environments and sought to rule those around them- however they pleased. Its easy to forget the horror, cruelty, the loss of life back in those times in this day and age because quite frankly, unless you've seen it for yourself, it is more of a philosophical discussion than anything else. MHO.
Which is not to say that I'm not a fan of the Black Prince- his military prowess alone made him noteworthy and anyone who studies medieval history or takes a fancy to medieval whatever is bound to hear of him eventually. I still think it funny that they found his sword languishing in an umbrella stand in a UK tobacco shop! That last bit might be urban legend.