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.
Base Breaker: Surgical Steel. Was it a worthy return that did their legacy proud while not merely repeating themselves, or was it a meandering, self-indulgent mess that got way too much undeserved praise and proved that they were over the hill and banking on their name to do the selling?
Magnum Opus: Either Reek of Putrefaction, Heartwork or Surgical Steel.