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.
YMMV: Castlevania 64
Awesome Music: The game did have some nice music, including the lonely violin piece that welcomes you to the starting menu.
Critical Backlash: While panned to hell and back by critics on release, it has built up a large cult following over the years who admit to loving the game.
Game Breaker: Carrie's homing fireballs. Also, if you charge one up and then utilize her close-quarters ring attack, it hits with the fireball's strength.
Good Bad Bugs: It's possible to get a vampire to latch onto your character's crotch while he uses his blood-suck move by simply standing on a chair. Showcased in this video.
A nearly-functional jump shock is spoiled because the vampire in question must have jumped straight out of a solid oak table in the middle of the room to attack the player from the angle he does. To conceal this, in the next shot, the table vanishes.
The dialogue reads "Darkness will rule!", but the spoken aloud in the game, it sounds somewhere along the lines of "Darkness will row".
The game had a few reviled levels, thanks to sluggish movements and unhelpful camera angles. But the worst is the Castle Center, in which you had to carry an exploding gunpowder keg, requiring you to make the whole trip without taking damage or jumping. This applies if you're carrying the Nitro, which is the one that requires going the long way around. The Mandragora doesn't have those drawbacks.
Another contender for the title is the original version of Duel Tower, which they forgot to put save points in.
Toy Ship: In Carrie's imperfect ending, Malus convinces her to promise to marry him.