Yanno I'll always have a soft spot for the movie cuz it was my first ever exposure to Hellboy, but after reading the comics and then rewatching the movie you realize how different they are from each other. It's not that the way they characterized him is completely wrong or anything but how they wrote him in the movie makes him seem so, childish. He acts more like a rebellious teenager rather than the grown 50 something year old man that he is in the comics and same goes for all the other characters, Abe is delegated to some sort of sidekick-esque character, Liz, while still upholding some of the nuance she had in the comics, is turned into a love interest despite them never being implied to have that kind of relationship in the comics and Kate Corrigan isn't even there.
