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: Donald In Maui Mallard
Awesome Music: The whole soundtrack. The SNES version loses some points for lacking the boss theme, though - but makes up for it with its exclusive Flying Duckman music.
The PC version uses redbook audio, allowing for a totally awesome orchestral version of the score! Provided by none other than Michael Giacchino!
Goddamned Bats: The SNES version has the flame enemies in the volcano level, and the zombies in the land of the dead. Every time you hit them (gun or staff, doesn't matter), a homing flame/bone will fly out of them and hit you in the face for a good amount of damage.