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.
Conspicuous CG: Ashes to Ashes suffered from it. Blood Feud remedied that slightly.
Continuity Snarl: Blood Wings has very little to do with the first one, retconning the Witch and Pumpkinhead's backstory. The later sequels simply ignore Blood Wings and tie themselves to the original.
Idiot Plot: Much of the plot of Blood Wings is set off by Danny killing Tommy's mother for no reason and then summoning Pumpkinhead for, again, no reason.
Moral Event Horizon: Haggis usually warns the would-be avengers that they're about to cross it.