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.
YMMV: Castle Falkenstein
Anvilicious: Technology is dangerous and natural bad, used to create dystopias, mad science, destroy nature and by the Unseelie to wipe out humanity. It must be tightly controlled and slowed down for the sake of the world.
Angst? What Angst?: Tom really doesn't seem to suffer any anxiety after being separated from his family, friends, way of life and even home country or the fact that his sudden disappearance would cause them any grief, only sending a package for a tabletop game to his old job as his only goodbye note.
Chaotic Evil: According to Auberon all Faeries were like this in the beginning. As of now, only the Unseelie seem to apply for the job. Oh and your run of the mill Mad scientist.
Crazy Awesome: New Europa technology works as such : "As long it sound plausible and it's cool enough, it works. No questions asked".
Crowning Moment of Funny: When the author learned of genteel Victorian opinion of a certain staple of modern pen and paper roleplaying gaming equipment.
Then I mentioned the dice. I distinctly recall that one of the ladies fainted.
Gameplay Derailment: Combat mechanics. It's almost universally agreed that it's better to use other models. In it's time it was Lace & Steel. Now you can get from Eberron to Victoriana and anything in between.
Values Dissonance: Curiously, we hardest you can get it is not from 1800 people but from the protagonist Tomas. Firmly a kid from Generation X and feed with Cyberpunk literature, his constant complaints during the book and his cynic views of technology as a tool for oppression, massive corporations and the fatalistic nature of advancement go at odds with the generation of the 2000, for whom Technology is freedom and it's advancing is as important (if more commercial) and tool for the benefit of humanity as to the people of New Europa.