For me it would be Magneto for X-men: Children of the Atom way back in the day (before I even knew basic fighting game mechanics).

Thanks!  Seems like a shame, since I always enjoyed the music for the other games

Probably will pick this one up for the story in a month or two, though I'm a little worried about the controls.  Oh well, won't be the first time I die in a Castlevania game.  By the way, how is the music in this game?