Castlevania: Dawn of Sorrow and Castlevania: Portrait of Ruin have a few amazing moments, like being able to kill the final boss in seconds flat using the final equipment, though that's sort of one of my complaints about the game. I did enjoy doing some things, like using dual crushes in crowded rooms, sending body parts everywhere, and the cgi opening of PoR is just beautiful.
I'd say the enemies were unique with stellar deaths...but almost all the enemies were from Symphony of the Night, so I can't.
The music was mostly 'blah', but Simon's track was pretty good...and from another game! Like everything else in the DS Castlevanias. Konami should launch an advertising campaign, saying: "Yes, we recycle!"