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.
Even Better Sequel: Despite diverging even more from the source material, The Golden Army is liked just as much as, if not more so, than the first film.
Fridge Brilliance: Nuada's fighting style is mostly based on speed and agility, doing all kinds of elaborate maneuvers to land hits on his opponent without being hit back. And he shares a magical link with his twin sister that means that everything that physically happens to him also happens to her and vice/versa. It stands to reason that he developed his fighting style in order to keep his sister from getting hurt along with him, supported by the first fight scene where he gets hit in the face and then turns to Nuala, clearly horrified as they both start bleeding.
Ho Yay: It says something about the writers (or maybe the actors) that the most romantic scene in the either of the films is two dudes getting drunk and singing "Can't Smile Without You" to each other.
Sequel Decay: Humanity goes from being heroic, productive, and cautiously positive towards ( still loosely secret ) Hellboy, to being at best useless and in the way. The biggest reason Nuada has fans is because its hard to disagree with him about humanity, as far as the sequel is concerned.
Hellboy seemingly regressing into an even bigger jerk in the sequel from the slightly more mature hero he was at the end of the first film may count.
Tear Jerker: Nuala's sacrifice, particularly because it makes Abe of all people shed a tear.
Unintentionally Unsympathetic: Hellboy in the sequel. True he was kind of a jerk in the first film but he was a likable jerk, in the sequel he comes off less as a Jerk with a Heart of Gold and more of a Jerk with a Heart of Jerk, outing his entire company and girlfriend without their consent, opening them all up to the judgment of the world with no regard for their feelings and... we're supposed to feel bad for him when this all blows up in his face?
The Problem with Licensed Games: Both Hellboy games had outdated graphics and repetitive gameplay, and the first one was full of bugs. Although The Science of Evil was supervised by Mignola and Del Toro, it didn't make up for the programming shortcomings.