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: Ninja Scroll
Complete Monster: Gemma Himuro is the leader of the Eight Devils of Kimon, and stands out from his men in his callous disregard for all around him. In the past, Gemma betrayed his allies and framed a warrior named Jubei Kibigami for the betray, forcing Jubei to kill his friends in self defense. In the present, to cover for the Eight Devils' movements, Gemma has a well poisoned to wipe out an entire village. He organizes multiple massacres and even murders his employer, declaring he himself will be the true ruler of Japan in the end. Gemma also kills Jubei's beloved, Kagero, in front of him, solely to hurt Jubei. Gemma, in the end, cares for nobody. The deaths of both his lovers in the Eight Devils arouse no emotion in him, and he witnesses every ally he has die without even changing an expression. His only concern is the gold imported to Japan, all to feed his bottomless greed.
Foe Yay: Yurimaru really seemed to be getting his jollies from stringing up Jubei and electrocuting him.
Gateway Series: No doubt this has been many peoples' introduction to anime.
Nightmare Fuel: Highlights include: Tessai's sickening massacre of the Koga ninja; Benisato using the skin of an old woman filled with serpents so she could lure Jubei where she wanted to trap him; the death of Mushizo when he falls underwater and is torn apart from the inside out by the hornets trying to escape his body; and of course, Genma's death scene.
If you suffer from trypophobia, try to watch any scene with Mushizo without scratching. You will fail.
Superlative Dubbing: Quite well done for an anime film released in 1995 in North America, and seems to rival most of Funimation's dubs. It trades in some typical stock anime phrases with some typical action movie stock phrases, but considering the subject matter, it just works so well.