I voted Smaug. He has all the qualities of a great villain, but personally I loved his attitude best. "I am SMAUG! I kill when I wish! I am strong, strong, STRONG! My armor is like tenfold shields! My teeth like swords! My claws, spears! The shock of my tail, a thunderbolt! My wings, a hurricane! And my breath, death!" Such a charmer, that one.