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.
Complete Monster: Every single reincarny is irredeemably EVIL. The reincarnies always get back to their evil ways right after escaping from hell, they never learn their lesson. The demons and Luke, however, subvert this. They are doing their jobs, and even though they do some questionable actions from time to time, it's all for the sake of bringing the reincarnies back to hell, and considering the morality of such reincarnies, you could consider it a necessary evil.
Demon: As funny as that would be, I can't do that.
Scrappy Level: The air duct maze in Riley's Out Again. Later versions added an option to skip the maze entirely. The demon even lampshades how "tedious and unfun" it is.
