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 opening theme. Takayuki Miyauchi's voice is powerful.
Never Live It Down: Even though Shadow Moon eventually did a Heel-Face Turn here, he's usually remembered as a "Kickass Kamen Rider villain", thus he usually gets villain roles in other works featuring Black and RX.
To the point that, in the first Kamen Rider Decade movie, an alternate Shadow Moon is the Big Bad, and it takes a mass Rider Kick performed by every title Rider from the original through Decade to finish him off.