You're probably right on a mix of styles, but more of the old way, and some of the new music should be used as well, as it's epic, but the old stuff was just too awesome.
As for style, some of dialogue is classic.
Alucard: ??? "[In English] Punk!"
Alucard: "You who knows no shame. Dressed as a priest. Using ghouls as your servants and not thinking of any other way. No respect as a vampire. There is no place for the likes of you, even in hell!"
Alucard: "A regenerator?" "Can't live on as a human. I shall send you to hell, in place of God." "Beg for your life, you son of a bitch."
Alexander Anderson: "What, to a decadent bloodsucker who uses weapons made by humans?"