>game
Rondo of Blood
>story
SOTN, I liked the Vampire Hunter D movie from 1985 already, so SOTN felt like playing a game based on it within the Castlevania universe.
>character
Simon, can't beat the OG. In all of its iterations except the new millennium one, Simon is not a redhead manga boy.
>bosses
Paula Abghoul and Fred Askare is one of my absolute favorites boss fights in Castlevania. Some others I also really enjoy are Werewolf in Rondo and She-wolf in X68K, Princess of Moss, and of course Death fights, most of them.
>weapons
Whip. Sub-weapon, depends on the situation, I'll be unoritinal and say cross.
>areas
I like the pretty ones, like the ball room from IV (which also works as a castle entrance stage), Versailles from Bloodlines, the doll house from X68K. I like the sort of decadent aristocracy vibe, fits Castlevania pretty well. Of course I also like most of the other areas like forests, dungeons, clocktoers, but elegant, castle-like rooms are my favorites. I also love the chapel from Rondo and the chapel from SOTN.
>music
All of it, pretty much.