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.
A small cluster of fans think that Weiss is a Tsundere, and that's why she acts so abrasive to Ruby. It's a common subject for forum jokes.
After Episode 12, some people are starting to think of Jaune as less of an underdog and more of a thick-headed Glory Hound than anything else.
Arc Fatigue: In Volume One, the "Jaundice" (Episodes 11 and 12) and "Forever Fall" (Episodes 13 and 14) arc of Cardin being The Bully to Jaune (even with the finale) was assumed by various fans to take entirely too long and be redundant given Jaune's behavior in Episode 8 against a Deathstalker, and taking away any spotlight from other characters by taking up a quarter of the sixteen-episode volume.
Yang Xiao Long's trailer theme, "I Burn". Her theme is split into four parts, the first three are remixes of the previous three songs, and the last part is her own personal theme. The finalized version and its remix do not have those remixes in it, but is awesome on its own.
Episode 8 introduced the song "Red Like Roses Part II" which played during the episode's climatic battle. Fan reaction was so strong that the version from the episode was put up on iTunes, despite the fact it wasn't even the final version. Here is the version that played during the show. The final version featured the even more lyrics, and turns the song into a duet.
Adam immediately developed a bad rep from the fans from his role in the Black trailer. Fans felt that Blake should've gotten more opportunities to shine, bemoaning how it was he who took out the Spider Tank instead. They may show interest in his role for the story and his connection with Blake, but even in this case, they're turned away due to his inexperienced voice acting.
Ruby is getting some of this as well, largely due to Designated Protagonist Syndrome. While she's a favorite among plenty of fans, others don't think she's deserving of leading the team (or the team and series essentially being named after her) due to her inexperience and personality. This isn't helped by her decreasing presence in the story after Episode 10.
Broken Base: Some of it is nitpicking, while others are more divisive.
The voice acting is easily the most contentious aspect of the series so far. The question is whether you're basing your complaints on the voice pitches or the voice acting. In a remarkable transition, Vocal Evolution has rendered much of the conversation obsolete.
Ruby's Perky Goth voice at the end of the Yellow trailer led to mixed reactions as well. The high-pitched, somewhat childish tone does fit her, admittedly, given her short height, youthful appearance and apparentcheerfulness. However, it doesn't mean people particularly like it either. Part of the blame can probably be attributed to the fact that the way she was presentedin the ''Red'' trailer suggested otherwise. Monty himself says that the "Red" trailer was more of a weapon resume than a character trailer; Ruby had no actual character in it. Of course, following episode 1, most people aren't complaining about it as much now due to Vocal Evolution.
Weiss' bitchy attitude during the first half of Season 1 caused some friction, especially from those who saw her trailer and pictured her as The Stoic lonely girl. Some like the extra fire (and the extra comedy that comes from her friction with other characters), but others dislike it on account of her being, well, a bitch when it isn't really needed. Finally seems to be lessening as of Episode 8.
Crazy Awesome: Need a mode of transportation? Ride an Ursa. Comrade can't make a proper jump? Destroy the bridge for propulsion. Team leader is being bullied? Offer to help by breaking the bully's legs. Nora is made of this.
Ruby counts as well for being the one to come up with the ridiculously awesome "Slingshot Trick".
Creepy Awesome: Cinder Falls, thanks to a suprisingly chilling performance by Jessica Nigri.
Designated Protagonist Syndrome: Interest in other characters than Ruby (particularly Team JNPR) has caused her to be eclipsed by the rest of the cast, but she's very much well-liked by the fandom nonetheless. The problem here is that, for a 16-episode first volume of a show called RWBY, some fans are concerned that (so far) the main focus is on Ruby, Jaune, Weiss and Pyrrha (in that order), as opposed to the titular team.
Though Team RWBY started to receive a bit more attention in episode 15, specifically for Blake. Whether or not this will continue has yet to be seen.
Die for Our Ship: Sun Wukong flirting with Blake and later having tea with her in episode 15 created a lot of hate from the Blake/Yang fans.
Melanie and Miltia (the former being a bit more popular between the two) are shaping up to be this. The twins already have a good amount of fan art, and quite a few fans hope that they have a recurring role in the actual series.
Also, Nora of team JNPR is getting quite a fan-base, thanks to her goofiness behaviour and awesome weapon.
The same day that the B trailer came out, the RWBY Facebook page was flooded with people asking for the Y trailer.
Quite a bit of the fandom is loudly annoyed at the short episodes. This conveniently ignores the fact that there are only ten people working on the project (not all of whom are animators), and they are already working themselves to the bone as it is, not to mention that Red vs Blue episodes are generally the same length. Since quite a few fans have mentioned that they'd willingly wait a longer period of time for longer episodes, they may just be more upset that there isn't as much happening in the episodes as expected. The lengthy amount of the virtually actionless, school-drama-focused second quarter of the first season did not help this.
Fan-Preferred Couple: Before the series came out Ruby and Weiss were shipped together constantly. This was most likely caused by the Deviant ART author LunarisFuryAileron whose RWBY 4komas were featured on Monty's twitter a few times causing the pairing to spread quickly. This continued on even after Ruby and Weiss were revealed to have very different characterizations then what the fandom assumed. (The joke that Weiss is Tsundere isn't doing anything to discourage the shippers either.)
In Episodes 11-14, Jaune's bully is named Cardin Winchester. Henry Beaufort, the Cardinal of Winchester, was the one who presided over Joan of Arc's trial and execution.
Fans especially knowledgeable about Ancient Greek philosophy will notice that Pyrrha's training speech in episode 6 references the traditional principles of arete, the Greek ideal of self-excellence.
Growing the Beard: Despite the initial hype surrounding the series (or maybe because of it), the reaction to the first few episodes was decidedly...mixed, with there being numerous complaints concerning the voice acting, short episode lengths, sparse (for a Monty Oum production) animation, and use of stock anime tropes. Still, the series soldiered on, steadily improving as it went. And then Episode 8 was released...
Weiss gives a long list of attacks on her family that made her life difficult growing up. The train robbery she mentions coincides strongly with the events of the Black trailer.
Blake's comments about the Schnee Dust Company's questionable business partners and controversial labor practices make a whole lot more sense given that, being a Faunus and in the White Fang, she would have found out a lot of their secrets/been on the receiving end of their cruelty and prejudice.
Ruby's theme becomes a lot darker after Red Like Roses Part II. "It's your blood that's red like roses."
While some complaints about the Black trailer are justified, there are fans who loathe it so much that they state the animation is inferior to the first two trailers. Needless to say, this is entirely baseless.
After the first episodes were released, some people were enraged that it wasn't nonstop fight scenes like the trailers... despite numerous statements from the team that the actual series would not be nonstop action.
People complaining that it looks like it was animated in the very low end program MMD, even though they are pumping out things on their level on a weekly basis.
After RWBY became available on Crunchyroll.com, it was immediately set upon by people demanding the "original" and "superior" Japanese audio... for an American-made series.
JesuOtaku (and Zac Bertschy, the executive editor of Anime News Network) both represent all of the major criticisms of the series while taking it to rather strangely inflammatory levels. Both believe the writing, animation, voice acting and all-around quality of the show to be terrible, and that the only reason the internet wasn't laughing it off the stage was that it was a fan production. They tend to post sarcastic snipes at the fanbase, the writers, and half-finished animation or glitches (of which Jesu posts a lot of .gifs of), on top of their circle of fans and hangers-on joining in.
He Really Can Act: Some fans are praising Jessica Nigri, best known as a cosplay model, for making Cinder sound absolutely terrifying with about three lines.
Months before Lie Ren was revealed, a prominent fan character was created. His identifying color is green, he is stoic (albeit far more so than Ren), and wields dual bladed pistols. During an interview, the crew mentioned that they have seen him and that these sort of things just happen.
Some (possibly) less informed fans assumed it was a Japanese animated series and demanded that Crunchyroll make the Japanese version available. Well, thanks to the effort of a fan they can watch at least one episode in Japanesenote It still requires them to register an account with Nico Nico to watch it of course.
Holy Shit Quotient: Very high, especially in the climactic battles in episodes 8, 14, and 16 of Volume One.
Hype Backlash: Let's be honest. You promote a series for half a year done by big shots like Rooster Teeth and Monty Oum and there will inevitably be those who feel the final product doesn't live up to all the hype. See Hate Dumb, Cliché Storm, and Fan Dumb above.
Something Completely Different: This trope may be a reason why. About the only similarities RWBY has to Red vs. Blue (Rooster Teeth's previous, widely loved series) is that they both have frequent comedy and cool fight scenes. In everything else, they're quite different.
Also crosses with Fanon. The trailers were released over nine months, and by the first episode's premiere, there were a lot of fan theories and characterization guesses floating around. When these fans watched the series, most of these theories were jossed in short order (Weiss and Ruby's personalities being the most obvious example) and it came as a bit of a shock. Now, whether or not such jossing is welcome, that's another story.
Blake/Yang is referred to as Bumblebee (or Bumbleby), in some circles. Meanwhile, Ruby/Weiss is referred to as White Rose and Candycane, with the former being more common by a fair margin.
Alternately, when characters in RWBY are shipped together, the pairing is referred to by the color that would result in their mixing.
Rainbow: The whole team
Internet Backdraft: The announcement that RWBY would not be released to the general public for two weeks after its RTX premiere had this effect. The backdraft probably wouldn't have been so bad if they hadn't announced this change 11 days before the premiere after more than half a year of hype.
Great Weiss SharkExplanation A tumblr user combined a gif of Weiss slowly appearing behind Ruby in episode 3 with Jaws music. Puns quickly followed, and Weiss suddenly became associatedwithgreat whites. At this point there even exists an RP blog for a shark Faunus Weiss.
Some fans like to portray Ozpin as a Troll after seeing his reaction◊ to Jaune flailing helplessly in the air.
"We'll break his legs!"
Blake being fed up with everyone around her making cat puns.
Cardin, for his constant bullying of Jaune and Velvet. His now blackmailing Jaune to do his school work has made many a fan want Nora and/or Pyrrha to go through with her threat of breaking his legs. Considering he was named after the man who oversaw the trial and execution of Joan of Arc, this outcome was most likely 100% intentional.
It's worth noting that Weiss was dangerously close to becoming this before Episode 8. Like, borderline. All of her interactions with characters came off as either combative, snide, or condescending, particularly her scenes with Ruby, who she had dismissed as childish and incompetent while she had shown no evidence of her own skills. She basically had no redeemable traits, and being the source of some the series' funny moments was the only thing she had going for her to a lot of fans. Luckily, this was remedied by having her work together with the rest of her future team flawlessly when push came to shove, and more character development in episode 9 and 10 makes her a lot nicer (or at least tried to).
Ship Mates: Within the fandom, it's not uncommon to find Ruby/Weiss shippers that also support Blake/Yang. Of course, this isn't limited to Team RWBY members; you're likely to find supporters of Jaune/Pyrrha and/or Ren/Nora. The trend seems to continue even if you mix and match.
Word Of God tells us to think of the initial release as 'beta testing.' The first version of each episode, released on Rooster Teeth, has its errors recorded by the writers on said wiki. A week later, a cleaner version of the episode with less errors is released on YouTube.
The animation itself has also been decried as being stiff and lacking in fluidity.
Almost every character has the same basic run animation for non action sequences. Granted, this is common in full budget video games as well, but it can be a bit glaring. The best example would be when the two teams are late for class, and eight characters have the same movements, though that might have been played for laughs.
Sweet Dreams Fuel: So far, the series can be seen as this. The setting is dark, yes, and multiple threats prey upon humankind, but there's a lot of comedic and heartwarming moments to balance that out, and heroism and epic deeds are the order of the day. (It helps that our main viewpoint is that of Ruby.) In some ways, it's a very optimistic series- although Cerebus Syndrome may well occur in future episodes.
Don't you worry about the dark / I will light up the night / With the love in my heart / I will burn like the sun / I will keep you safe and warm...
Tainted by the Preview: Some viewers were turned off by the inexperienced voice acting in the Black and Yellow trailers.
Take That, Scrappy!: Cardin finally receives a little retribution in the episode Forever Fall pt. 2: Jaune finally growing a spine to stand up to him, his teammates running away from an incoming Ursa and leaving him behind, said Ursa giving him a beating, and then being saved by his own bully victim.
The Untwist: After all the subtle and unsubtle hints that Blake is a Faunus, it was theorized that she was not a Faunus herself, but merely connected to them in some way. Turns out, no, she really is a Cat Faunus.
What Do You Mean, It's Not Political?: The White Fang, a Western Terrorists group that gives a bad name to an established minority group. Related, Weiss, a character represented by the color white, is presented as a racist, while Blake, who is represented by black, is a member of the group.
It doesn't help that exposition in episode 16 reveals that despite faunus officially being recognized as equal, they are still commonly mistreated. Even worse, it's mentioned that Schnee industries used "Faunus labor" and with the way it was said and how Blake mentioned back in episode 2 that the company was at the center of a lot of controversy, it's implied that the workers are either overworked, underpaid, have poor safety conditions, or may even be corporate slaves. It really does seem similar to how slavery was outlawed after the American Civil War, but not long after the Jim Crow laws were passed, creating more or less slavery in all but name.
Velvet's introductory scene has her getting harassed by Team CRDL for being a faunus, culminating to Cardin's aforementioned ear pulling. The poor girl had to leave the cafeteria humiliated and presumably in tears.
Having lied to get into Beacon, having no actual combat training and now being blackmailed by Cardin, Jaune is fast steering into this territory.
As of Episode 15, Blake appears to be heading in this direction, having been revealed to be a Faunus, subjected to Fantastic Racism by Weiss, and seeming to feel isolated from her team. Somewhat ironed out in the following episode, but there's still plenty of Woobie fuel.