Perhaps the biggest disagreement between fans is how the films fare as adaptations of the games. Some fans find them to be fine adaptations and like that they're not one-to-one adaptations of the games, enjoying them for bringing their own unique takes on the Sonic mythos rather than sticking too closely to the source material. By contrast, others hate the films precisely because they're relatively unfaithful to the games compared to other modern adaptations like the IDW comics and Sonic Prime, and wish Paramount had stayed truer to the games.
The near-lack of game music in the movies. Some fans hate it, arguing that the music from the games is a core part of Sonic's identity and that the films should do more to acknowledge it, while others don't take issue with it, arguing that the films are trying to do their own thing and that the music from the games wouldn't fit in.
The greater focus on humans. Some hate it and wish the films placed more focus on Sonic and his friends instead of a bunch of humans (bar Dr. Robotnik, for obvious reasons), with some blaming the focus on humans for the film's disliked aspects. Others don't take issue with this and argue that the films are still primarily focused on Sonic and co., unlike other Human Focused Adaptations, and that most of the human characters are at least more likable and enjoyable than those in previous Sonic works.
