Vampire Hunter D is the all time best anime based on the novel by Hideyuki Kikuchi. The impressive detailed artwork is done by Final Fantasy's Japanese artist Yoshitaka Amano. There are Vampire Hunter D novels, manga, and 2 animated movies as well. The characters, music, and storyline in both movies are very impressive in the way that they are done.
D is a mysterious "dhampir" (half human/half vampire) who's father is actually hinted to be Dracula. Because of being a half breed, D walks in the daytime and posesses dominating supernatural skills only shown by the strongest of vampires. D travels the world and hunts down vampires in a much more impressive way than other vampire hunters such as Blade or Buffy the vampire slayer. D's weapon of choice is a slim longsword which is shown to cut through pretty much everything and anything.