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.
Daphne: Poor girl with daddy issues and a hard childhood in the slums, or a self-absorbed, manipulative, boy-crazed girl who only cares about herself and what she wants, while struggling to focus on anyone's problems but her own?
Regina: a well-intentioned and caring mother, or someone who selfishly held on to a child that she knew wasn't hers?
Emmett: a misunderstood troubled teen with his heart in the right place, or an irrationally jealous person who borders on emotionally abusive.
Angelo: an estranged father hoping for a second chance or a slimy criminal looking for a cut of the lawsuit.
Critical Research Failure: This goes here, because more and more of the show's many Deaf fans are complaining that the actors are getting lazy and sloppy with their signing.
To top this, according to several of the "extras" who saw behind the stage, there is an ASL specialist, and yet some of the main actors refuse to listen to the specialist and continue to sign in their increasingly grammatically-incorrect way.
On an unrelated note, Daphne is a pescatarian, not a vegetarian, as she eats shrimp. A full vegetarian would not eat seafood.
Die for Our Ship: Some of the Ship-to-Ship Combat between the Daphne/Emmett and Bay/Emmett shippers mentioned below got up to these levels. The more vocal D/E shippers would often take Bay's intial selfishness and Bratty Teenage Daughter tendencies from earlier in the series and turn her into a domineering vixen that has a wimpifified Emmett under her thumb while completely ignoring her Character Development over the course of the season. On the flipside, the more rabid B/E shippers will twist Daphne up into a possessive and psychotic Yandere that wouldn't think twice to Murder the Hypotenuse, conveniently forgetting the fact that the worst things Daphne ever did were mostly a bunch of failed and largely half-assed attempts at Relationship Sabotage. Thankfully, it's died down with the passage of time, and from Daphne ultimately pulling a genuine I Want My Beloved to Be Happy in regards to Emmett and did give him and Bay her blessing.
Ty also received some, despite Bay and Emmett hooking up after they broke up, though that's thankfully died down as well. It was reignited when he returned during Season 2.
Invoked In-Universe when Kathryn and Regina pretend to be a couple at a book release party, in order to get one of Kathryn's exes to leave them alone. They keep going with it (and even kiss each other on the mouth) when they find that it also stirs up buzz for Kathryn's new book.
Jerkass Woobie: The new deaf kid, Travis. He's abrasive, rude, and gets on Daphne alot for no apparent reason. It turns out his parents, who are hearing, made no effort to understand him or communicate with him and Daphne is basically his only friend.
Narm: The Soup had fun with a scene from the pilot, where John is thinking about Daphne's disability, and hears an ice cream truck driving by while playing a tune. At night.
Wham Episode: Memory is Your Image of Perfection, in which Sharee's mother stabs Dr. Jackson, Bay loses all movement in her right hand, and Kathryn tells John that she's unhappy and the life they had created together isn't the life she wants anymore.
The Woobie: Take your pick. Bay, Daphne and Emmett all have their moments. Bay feels she doesn't fit with the parents that raised her and think they like Daphne more, and she feels her birth mother chose Daphne over her. Daphne feels angry with Regina for not telling her about the switch and keeping her from the Kennishes, then has Emmett choose Bay over her. Emmett watched Daphne date other guys for eight years, before having her express her feelings after he started dating Bay. Not to mention the Lonely Piano Piece that plays when he can't understand what someone's saying.