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.
Genius Bonus: If you're good at history of the Roman Empire, you'll understand a lot more about RayStorm, including the bosses and the storyline.
Nightmare Fuel: Con-Human from RayForce and RayCrisis, an evil super-computer that took over all of humanity on Earth to the point the only way to save Earth is to destroy it. The worst part is that it was a man-madesuper-computer! And the way it turned bad? It was hooked up to a cloned human—and somehow came to the conclusion that fresh clones were superior to normally born...not just humans, but pre-existing life in general.
"Molecular Clock" (Original ZUNATA version), the boss music for the sixth and seventh stages from RayStorm, can be a very unsettling song.
The Extra Mode ending of RayStorm.All of it. Working Designs' translation of the ending in the PlayStation version is much worse than HD's remake.
Most Annoying Sound: If you're not very good at RayCrisis's Special Mode, the Encroachment Meter will often spike above 90%, resulting in repeated alerts of "Encroachment over 90%!".
Narm: The Japanese version of RayCrisis has one of the bosses named "Sem-Slut," renamed to "Sem-Strut" in the English localization.
Sem-Slut's name remains the same in the Windows ports though.
Tear Jerker: The ending of RayForce. Our un-named heroine dies when the resulting explosion hit her RVA-818-X-LAY fighter, destroying it along with Earth. The final seconds of the credits pans to what remains of the wrecked fighter, and then we see the dashboard displaying Mission Complete just before the ship's power finally dies.
RayStorm as well. Consider that you just committed genocide of an entire planet in order to stop a rebellion. The Extra Mode makes it even sadder, as Earth itself got destroyed as well, and the player's ship was left to drift in space, never to be found again.