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.
Crowning Music of Awesome: The anime's opening theme combines a haunting soprano voice and symphony with techno elements, complimenting the mixture of technology, magic, and German myth referenced in the story itself.
It also helps that he's actively helping Ryouta as much as possible, rather than being a total Jerk Ass who's only interested in himself.
Narm: The anime likes to use a lot of conveniently-placed Censor Steams or strategically-positioned pieces of environment (like a log for Shino's death) in order to censor the gorier parts, likely due to the infamously traumatizing Elfen Lied preceding it (which is made by the same author and anime studio). Unfortunately, the censorship can take a lot of the intensity away from otherwise deadly-serious scenes.