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.
Broken Base: Starting with the second film, The virus being able to possess Angela really put a taste in some fan's mouth.
The third film, while still good, is mainly considered this due to it being less with Found Footage perspective.
Memetic Mutation: "Pablo, grábalo todo. Por tu puta madre"* "Get everything on tape, Pablo. For your fucking mother." (Contextually speaking similar to "you son of a bitch").