These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
The best part of Dracula X Chronicles is that you can set any song in the game, either original or unlockable, to play in any stage or fight you want, with the exception of the fight with Dracula (Except in the PAL version). Who doesn't like the idea of using "Bloody Tears" as the boss theme, or using the previously unused remix of "Cross Your Heart" as a stage-theme?
Game Breaker: Maria either counts as this or as an Easy mode. She's faster than Richter, she has a double jump, her jumps are much easier to control, she can throw two doves at the same time, which can hit the enemy up to twice, she can slide, she is slightly smaller than Richter, which makes a notable difference when you want to dodge certain attacks, and her sub-weapons, although different, can be just as deadly as (If not deadlier than) Richter's when used well. Her ending can definitely count as Easy-Mode Mockery though, as it's far less serious and far more cutesy than Richter's ending.
Magnum Opus: This is often a candidate for defining game of the series, and Toru Hagihara as well.
Nightmare Fuel: Maria's death animation where she falls to the ground, turns gray, and rots away counts.
They Changed It, Now It Sucks: The low-quality 3D visuals in Dracula X Chronicles, which wouldn't be so bad if it wasn't for the original game requiring unlocking and having sound issues.
While remixing the soundtrack for the remake, they took out Den, the Clock Tower theme unique to this game, and inserted Moon Fight from Castlevania Chronicles in its place. The original version of Den is still available, but this decision remains a odd one.