I can't believe no one's mentioned Steven Erikson's Malazan Empire! And only one vote for Dragaera?
Sigh. Sometimes I just don't understand the ways of the world.
So, Steven Erikson's Malazan Empire world -- the coolest magic, the craziest races, the most mind-blowing world history imaginable ("and then, 200,000 years later") -- dear lord.
Followed closely by Steven Brust's Dragaera -- can't beat it for sheer swashbuckling fun. Of course, you're never going to have a PC as clever and charming as Vlad or Khaavren, but you're not going to be as devious and original a DM as Brust anyway.
Sorry, once again, why is nobody voting for Steven Erikson? Am I all on my lonesome here?