My favorite: Symphony of the Night
I almost voted Dracula X because the remake on PSP is superb, but the original is so damned hard that it almost takes away from the game at points. I went with Symphony of the Night because I enjoyed the game the whole way through and even though there were times that were tough I knew I would get the hang of them and I almost completed the game to 200.6% but only got to 197% and really didn't feel like finding the other 3.6%.