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.
Arc Fatigue: The amnesia storyline, which was finally resolved at the end of season 2. Monroe went on to apologize for it during season 3.
Big Lipped Alligator Moment: So far, Renard's nightmare about Juliette appearing in his bedroom and turning into a hag in "Nameless" has yet to be explained or even referred to.
Broken Base: A mild example with the addition of Theresa "Trubel" Rubel to the cast. Some feel she's a welcome breath of fresh air into the cast, and others feel she's an unnecessary, annoying Mary Sue.
Juliette is also an example of this especially after her behavior during the Season 3 finale.
Creator's Pet: Adalind Schade. She seems to exist for no other reason than causing unnecessary drama in the other characters' lives. David Greenwalt has gone on record about how much he adores her...more than one fan has already stated that he's probably the only one.
Complete Monster: Oleg Stark from season 1's "Game Ogre" is an especially violent Siegbarste or ogre. A hitman for hire, Stark was arrested for a series of brutal murders and escapes jail years later to enact revenge, beating his guards into a coma. Stark hunts down and kills his lawyer, cutting out her tongue, as well as the jury foreman and the judge. The police find the judge's corpse with Stark having stuffed his gavel down his throat. Stark tries to kill the detective who arrested him by blowing up his apartment and when this fails, hospitalizes his best friend Nick to get his location. Even by the standards of the occasionally monstrous beings in Grimm called Wesen, Stark is known as an utter beast.
Sebastien, Renard's confidant. He's even got his own fan club - Team Silly Squirrel◊! (And they've nicknamed him Chirpy - it was originally "Renard's Canary", but "devolved".) They even pulled a "If Sebastien dies, we riot!" movement on Twitter and Tumblr. Sadly, Sebastien died anyways.
Meisner, owing to the fact that Damien Puckler is dead sexy◊ and a total Bad Ass. One (female) reviewer has taken to calling him "Tall, Dark and Dreamy".
He's got his own fan club as well - "Meisner's Army" or "Puckler's Army".
Theresa "Trubel" Rubel, for those who don't feel she's The Scrappy. Her fans find her very clever and remarkably tough, and it's refreshing to see someone thrust into her situation without griping about how hard it is. When she does talk about her past, it's in a very matter-of-fact way, though the events she describes are horrible. And she understands how privileged she is to find people who accept her.
Evil Is Sexy: Adalind and Renard (well, not when Adalind's in her Hexenbiest form).
And Renard's Wesen form turns out to be even more hideous.
Eric Renard is quite dashing, when he's not having people tortured or killed.
Khloe Sedgwick, the Musai from "Kiss of the Muse," professes that what the men who fall in love with her do (obsession with her, violent rage towards any challengers for her love) is not her fault, but over the course of the episode it becomes clear she both encourages it and seems to enjoy watching it.
Fan-Preferred Couple: Nick/Monroe and Nick/Renard. Nick/Ariel and Nick/Adalind are not as popular as the two previously mentioned ships, but they do seem to receive more enthusiasm from fans than the Official Couple Nick/Juliette and are gradually gaining more popularity.
Fanon: Lots of fans think that Monroe's full name is "Eddie Monroe" but Word of God says that's never been the case. As of "The Wild Hunt" his parents are using Monroe as his given name.
Genius Bonus: More like paying attention bonus, but Monroe brings up during Season 2 that he found his grandmother's antique picnic basket. What kind of wesen is Monroe again, and what well-known fairytale did one of those and someone with a basket feature in?
Nick calls Rosalee when he needs help with a Wesen medical issue. Monroe is jealous that Nick didn't call him.
When Nick and Monroe are talking about how they have to lie about their entire friendship to Juliette, it sounds more like they're talking about covering up an affair rather than hiding their supernatural natures.
When Nick walks in on Juliette hugging Hank: "Whoa, whoa, whoa! He's mine."
There's a mild undertone of Renard/Meisner and Renard/Sebastien (which is amusing when one of them seemingly gets jealous when Renard pays attention to the other - Meisner glares and puffs up, and Sebastien pulls out the puppy-dog eyes).
Jerkass Woobie: Captain Renard. He was born the son of a King to a hexenbiest mother, ostracized from the rest of his family. Then when his stepmother the Queen found out that he was a zauberbiest, she tried to have both him and his mother killed. They escaped to America, where he ended up as a cop. His family (especially his brother) has tried to kill him more than once. And that was before the business with Juliette and the zaubertrank. That was when the Sanity Slippage started, forcing him to reveal himself to Nick. That same Sanity Slippage also led to him being seduced by Adalind which led her to becoming pregnant, most likely. Then he finds out he's a father, and then has to give up his child forever.
"Synchronicity" and "Law of Sacrifice" seem to bring her full-circle. All the bad stuff that happens and all the Oh Crap moments that sneak up on her are all a consequence of her own bad choices and actions, up to and including having her baby taken away. You either feel bad for her or delight in her Laser-Guided Karma or both.
Magnificent Bastard: Captain Renard. He gets a rather amusing line in one episode where he deadpans "Yes, I am Royal, and yes, I can be a bastard."
Adalind is a Magnificent Bitch...maybe. Recent events may revert her to her old ways.
They had both better watch out for Viktor, though...
Moral Event Horizon: Adalind went screaming right into the event horizon during the Season 3 finale, essentially raping Nick and taking away his powers as a Grimm while disguised as Juliette. To make matters worse, she purposefully brought up the past issue of Renard and Juliet's obsession curse and tried to confuse their feelings merely out of spite.
Narm: When Adalind meets Frau Pesche, probably intended, at least for the weirdness.
Frau Pesche: I knew your mother well.
Adalind: Me too.
Although, the tone of conversation suggested that Adalind was really not sorry to see her mother go and really wanted Frau Pesche to stop talking about it.
Each and every time Captain Renard speaks German. The man grew up in Austria, you'd expect him to get the syntax right, at least. Same goes for most other instances of characters speaking German, although Monroe is excused for being a third generation immigrant.
It's even more egregious now that part of the show is set in Austria - some of the guest stars are absolutely horrendous (and there are complaints about Sasha Roiz unconsciously adopting the accent of whoever he's speaking to).
Possibly handwaved by how we don't know how much time Renard spent in Austria. He went to school in Switzerland (a French-speaking nation) and his mother is French-speaking. It makes sense that French is his stronger language. Also note that he and his brother spoke to each other in French, not German.
A scene in "Blond Ambition" has Renard reading one of Adalind's spellbooks (in German) and having to read out loud each sentence in German before translating into English, implying that he's not actually fluent.
Nick's nightmare about Monroe and Rosalee's wedding. Supposed to be very creepy, it provokes more laughs than terror.
When Sebastien is interrogated, he is subjected to the cruelest torture of all...waterboarding. One is half-expecting Viktor to call for the comfy chair next. Not that waterboarding isn't a grueling ordeal, but hardly the first thing one comes up with when thinking of Cold-Blooded Torture.
One-Scene Wonder: Many side-characters like Hap, Roddy, Barry, Holly, and Bud The Fridge Repairman (before he was promoted to a recurring character) have gained following.
Valentina Espinosa and Ian Harmon were nowhere near them, but in way of growing into it.
Casey, a would-be victim in "Mr. Sandman". She actually does some pretty Genre Savvy things like covering her eyes against a wesen that targets them when he attacks her, gets a weapon as soon as she's able to, and ultimately is the one to defeat the wesen of the week.
This sticks hard for Juliette, and not so much for Hank (at first). Although Juliette could still rapidly head back to Scrappy territory. Actually, while many people love it, some people are complaining about the amnesia storyline, and, despite her good amount of fan love, some people are claiming Bitsie Tulloch is the weakest cast member.
Finally achieved for Hank "One Punch" Griffin in in Bad Moon Rising when he goes from freaking out over finding out about the Wesen - and that his goddaughter and best friend are one - to dropping a Coyotl (in full game face, no less) in one punch!
The Scrappy: Adalind, for some time until the penultimate episode she appeared in in season 1 showed that she had a Stage Mom and was a Love Martyr to Renard. That, Renard's Manipulative Bastard-ness and her elegant and carefully-thought revenge increased her popularity for a while. However, her vile intentions and careless actions towards her own unborn child began to drag her back to this status. She seems to suffer from an endless supply of stupidity and her monster baby storyline dragged out almost interminably, taking time away from the main storyline in Portland. And now that she's pretty much crossed the line by raping and depowering Nick in the Season 3 finale, she has fallen back into Scrappy status.
Juliette's been wavering in and out of this trope, but seems to have been rescued from it, albeit in a special way.
Ships That Pass In The Night: Roddy Geiger ("Danse Macabre") and Barry Rabe ("Bears Will Be Bears") are frequently shipped together, presumably because they are in the same age group, despite the fact that they have most likely never met. And both of them tend to get shipped with Holly Clark ("Let Your Hair Down") for roughly the same reasons.
The actress playing "Mrs. Garcia" in "El Cucuy" is 54◊. Mrs. Garcia is 77, and the costuming department thought that the way they could age her up was giving her a ridiculous, cheap-looking wig◊. It looks worse in the episode - it looks unnatural and you can almost see where the wig ends and her real hair begins!
Handwaved in that old age effects are among the most difficult to pull off. And that said, much like La Llorona and Volcanalis, El Cucuy is presented or heavily implied to be extremely long lived. So while she may be 77 years old, it may not mean as much to her species as it does to other wessen and humans.
Squick:The less said about the frogs in "Lonelyhearts", the better. Or the rats in "Danse Macabre" who chewed off a man's face. Or the judge with a gavel shoved down his throat and the woman with her tongue cut out in "Game Ogre".
How Spinnetods kill their victims.
Not as bad as some other examples, but two words: Blood. Cookies.
Basically, if you're going to get killed by a wesen who isn't concerned about The Masquerade at the moment or you're bumping into a wesen engaged in some of the more instinctual habits... it's probably not going to particularly nice.
What Geiers are infamous for as a species - brutally harvesting human organs from victims that are still alive, be they wounded soldiers on the battlefield or homeless kids on the streets - and selling them on a Wessen black market that uses the parts like apothecary ingredients.
The Lowen underground gladiator ring feeding new contestants the remains of defeated fighters.
Let's also not forget how traditional Coyotl families "introduce" seventeen-year old female members to the pack. Which is not an introduction and just a way to sugar-coat gang-rape and incest.
Also in "To Protect and Serve", Nick falls into a pit of decomposed corpses. When trying to find his flashlight, he accidentally grabs rotten body parts.
In "Mr. Sandman" we get the image of a parasitic worm wriggling out of a persons bloody eye socket. Sleep well.
A pregnant Gluhenvolk's "pickles and ice cream" is apparently raw cow ovaries. Yum.
The hideous fate of Blutbaden who ate the "Black Despair" mushrooms in "Best Served Cold". Their helplessness and hopelessness are as horrible as their agony.
Tastes Like Diabetes: In "The Bottle Imp", the foster family that April is sent to live with have shades of this. The audience is not surprised when after five minutes of dealing with them, she puts on her Game Face and attacks.
Tear Jerker: Angelina's death and Monroe's grieving for her.
Unintentionally Sympathetic: The Bauerschwein. Twice we've had episodes casting the Bauerschwein as the villains in the Blutbad/Bauerschwein feud, but it's difficult to forget that the Bauerschwein have been on the receiving end of the Blutbaden's brutality for centuries. The only laws that could even begin to protect them are the Second Amendment and castle laws. And although the Bauerschwein's methods of revenge are definitely cruel, they're also pretty darn clever. On the other end of it...
Vanilla Protagonist: Some fans consider Nick's vanilla characterization to be a strength of the show, since it is a nice reprieve from all the "special" or "tortured" protagonists which are especially common in Genre show. Nick being a normal boring person who deals with his new abilities without a lot of drama is one of the aspects which sets the show apart.
What an Idiot: It's probably not such a good idea for Adalind to be letting so many people know she's carrying Royal blood. Or for her to to trust Stefania so completely since the latter has already shown backstabbing tendencies. She never even asks Stefania to completely explain it to her; she only blindly follows instructions. Or for her not to think that the Royal Family just might be watching her when there's a camera inside her room! And then shunning and snarking one of the few people who may be able to help her if things go sour. And then when she is in a restaurant and she knows that someone is sitting behind her staring at her, she tries out newly discovered telekinetic powers. You know, two seconds after she's made aware someone is watching her. When her unborn child begins to kick unnaturally and starts causing her pain she waits until she's writhing around in agony before calling Stefania and asking for advice. And when told that she is facing an Express Delivery, she reacts not with the slightest bit of concern (and again, no prying questions) but with mere annoyance. In fact it might be easier to list the things she does that aren't idiotic.
Hap, the friendly Blutbad in "Three Bad Wolves" who gets killed over a blood feud he was never personally involved in.
Monroe is a Blutbad who lives apart from his family, likely because he has a vegan lifestyle while they still hunt. In "Three Bad Wolves" he gets caught between looking for vengeance of his friend's death and staying out of the fight to avoid escalating things to worse levels... even though that means his former lover may end up dead. Things go great for him for a while but now stands in danger of being disowned from his family altogether for loving a Fuchsbau.
Nick during Season One and Season Two. After he proposes to Juliette, she turns him down because she can tell he’s keeping secrets from her. Of course, he’s keeping secrets to protect her from the crazy dangerous stuff that he now has to handle. When he finally tells her, she doesn't believe him. It takes all of Season Two for things to be made right between them. However, with his new powers coming into play Nick was getting less pitiful and more of a threat. But then he lost his powers after being deceptively raped by Adalind.
Rosalee. She grew up different because she is Wesen. She pursued the wrong crowds to feel like she belonged. She ended up getting addicted to drugs and landing in jail, unknowingly missing out on her own father's funeral. She loses her brother to an armed robbery. Then she finally meets Monroe and everything is fine...for a while. She even manages to get reconciled to her mother and sister. But then she meets Monroe's parents. They turn out to be species purists who refuse to give their blessing to the relationship and Rosalee leaves the house in tears.
Sebastien. Worked as Renard's spy in the castle, was captured, tortured◊ and beaten to within◊ an inch of his life◊ (and as a result was forced to betray Meisner and Adalind), manages to ambush his captors, but ends up being shot and killed by Viktor after he ran out of bullets. Some fans have speculated that his death was his way of trying to make amends for the betrayal.