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.
Growing the Beard: On the author's part. Whether you consider The Host to be better than Meyer's previous work or not, it uis certainly better received.
It Gets Better: Several reviewers have commented that the beginning is weaker than the rest of the novel.
Purity Sue: Wanderer; granted, she's not as egregious an example as Bella, but still. She's honest, sweet-natured, and gentle to a fault, and toward the end she has quite a circle of admirers amongst the human clan. Those who do not admire her either don't know her, or, like Maggie and Sharon, are described as shrewish and hateful. At the end, she even looks the part, and Doc comes dangerously close to pronouncing her Too Good for This Sinful Earth.
Which is why Melanie's perspective, for most of the story, is painfully overlooked. Maggie and Sharon are Melanie's aunt and cousin - maybe not as close family-wise as her brother, and definitely weird in some ways, but still family nonetheless. She knows much better than Wanda about their lives and personalities, and why they are bitter and hateful toward Souls. At the very least, she could have spoken up for them when Wanda made biased judgments about them. But Melanie hardly ever speaks up at all - and only when Jared is somehow involved. When somebody doesn't stick up for their own family in favor of the main character's point of view, there's a bit more than first-person bias going on.
They Wasted a Perfectly Good Plot: The book has a lot of room to be really, really good, what with benevolent aliens taking over the world, the divide between what's ruled by your body and what's determined by your mind, the difference between Wanda's love for Ian (purely mind, since she doesn't have a body) and Melanie's love for Jared (more body, since her mind is overpowered by Wanda's), the morality of Utopia Justifies the Means... it could have been really awesome if it hadn't been eaten by the weak beginning and worse ending.
The 2013 film based on the Stephenie Meyer book:
Critical Backlash. The movie has been near-universally panned by critics and currently holds a score of 9% on Rotten Tomatoes. Moviegoers' reactions have been rather more mixed.
Narm: Turns out having your main character be a prisoner in her own body, who spends most of the story impotently screaming at the person controlling it, is rather silly to see on film.
Tropes applying to the Korean film:
Narm: The scene where the Park family mourns for Hyun-seo (who is still missing by the way) in the shelter. It's jarring that they ended up rolling on the floor while crying which makes the viewers wonder if they should find this scene sad or funny.