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: Masked Rider
Awesome Music: The opening theme is surprisingly good (it almost sounds like a tribal tune with the heavy use of drums and the "MASKED RIDER!" chants). Take a listen.
Ink Stain Adaptation: Not just to the Kamen Rider franchise, but to the name "Masked Rider" itself. Even though "Masked Rider" is used in official merchandising in Japan (even on the logos of the shows), most English-speaking fans refused to use in order to avoid confusion with the Saban version. When Steve Wang was commissioned to make Kamen Rider Dragon Knight, even he refused to use "Masked Rider" and was forced to convince Ishinomori Production to keep it as "Kamen Rider" instead.
This may have been due to the rider names being read off in chronological order, which didn't match up with the footage. The script seemed to assume that Kamen Rider 2 and Riderman would be there, but they weren't filmed doing their roll call (Rider 2 did appear at the start of the scene but never got to say a name), so V3 got the line that would have gone to Rider 2, X got the line that would have gone to V3, and all the others were moved up two slots.
They Just Didn't Care: This probably has to do more with a low budget than anything else, but when the show uses footage from other Kamen Rider works (ZO being the most blatant) and doesn't try to film new footage instead... and when the new footage is basically "three stooges with monsters" featuring Dex fighting off insectoids with cream pies in one example... yeah...