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.
YMMV: Yu-Gi-Oh! Card Game
Author's Saving Throw: The Forbidden/Limited lists are supposed to be this. Whether or not Konami has succeeded depends both on the players' reactions to it, and how tournaments progress with the changes each one makes.
Another would be the advent of "Problem Solving Text", where Konami attempted to reword effects so that they're less ambiguous and easier to understand.
Several cards, usually boss monsters such as Judgment Dragon, Dark Armed Dragon, Grapha, Shi En, etc.... Heavy Storm is in a similar vein, especially after its September 2013 ban.
Exodia is still very popular since the first episode, but since the recent Exodia decks are very powerful, the Forbidden One has moved to this category.
Broken Base - The very announcement of a Forbidden List for the game caused a huge uproar in the community. Some saw it as a much needed change to the game as several recently released cards forced players to play one type of deck to stand a chance at tournaments, while others became rabid at the thought that their expensive cards would now become utterly worthless. This is the sole reason why there is a Traditional and an Advanced Format in the English TCG.
Xyz monsters, for being even easier to summon than Synchros (with high stats and great effects to boot!), made quite a rift.
When expensive, rare cards are re-released as inexpensive, common cards. Some will praise the decision for allowing powerful cards to be more accessible to a wider variety of players, others will grind their teeth and scream bloody murder as the cards they've shelled a lot of dough for suddenly become dime-store commons. For example, compare a Tournament Pack 2 Morphing Jar with this one.
The September 2013 banlist caused a huge one in the Western dueling community. Not only did duelists raise an uproar over the Western list being drastically different than the one in Japan, but there was a clear divide - duelists either loved it for killing off a lot of the old staples and thus forcing duelists to play more strategically, or outright hated it for completely killing their decks.
The announcement of a Fire Fist Special Edition Box immediately after the announcement of the April 1st banlist. You either love it for the shiny "Fire Formation - Tenki" card inside or hate it because it's either a ploy to sell a lot of these (Fire Formation - Tenki was not affected by the banlist at all despite the Fire Fist deck being the dominant deck in tournaments right now) or not a Fire Fist Structure Deck. As a matter of fact, the name itself is a misnomer - there's no guarantee in any of the packs that you'll get any other Fire Fist support at all.
Early on in the game, Jinzo was extremely popular. It helped that he became one of Joey Wheeler's signature cards on the show, and that he provided a way to bypass some of the more powerful Trap Cards at the time (such as Imperial Order.)
Dark Magician Girl is the most iconic female monster card and she's considered as the sexiest by most of the fans.
Early on, the Gemini Elves were popular for being a strong level 4 Normal Monster card and being sexy.
The fanart for the Charmers is immense, especially in Japan. For example, take Pixiv. Red-Eyes, one of the most well-known archetypes in the game, has 9 pages of artwork. The Charmers, on the other hand, have at least 60 pages.
Skull Servant. Among the many, many weak and underpowered normal monsters, it was known as theweak and underpowered normal monster (probably because it came first in the set, it looks goofy, and even its flavor text acknowledges its weakness). Konami even acknowledged this by making an entire archetype around it and having it be a running joke in card art cameos.
Poki Draco, due to a Facebook page, as a prank and to prove a point on how foolish people buying singles can be, temporarily causing an inflation in its price by putting a bunch of them up for $15 on ebay.
Any deck from the "good old days" of Yu-Gi-Oh can be this, especially if they receive new support that makes them competitive. One deck in particular stands out - Gravekeepers. It was not only one of the first archetypes in the game, but is actually one of the few that invokes the ancient Egyptian mythology that the very game itself is rooted in. Not only that, but gameplay-wise, they receive consistent support from Konami that keeps them relevant, and is also widely regarded as the Anti-Meta deck, due to its star card, Necrovalley, putting a stop to most Graveyard strategies.
Cards like Dark Magician, Blue-Eyes White Dragon and Red-Eyes Black Dragon, the iconic monsters of Yugi, Kaiba and Jonouchi, are still very popular.
Cyber Dragon was very popular in the GX era, since it's easy to summon it. Cyber Dragon's decks in general were popular at that time.
Among the six Signer Dragons, Stardust Dragon and Black Rose Dragon are the most popular ones thanks to their effects. The latter is probably the most popular one, since Black Rose Dragon can reset bad situations.
Strong archetypes like Blackwing, Lightsworn, Six Samurais or Dark World can be either this or are Base Breakers.
The aforementioned Blackwing archetype is the reason why Crow Hogan became the fifth Signer in favor of Rua instead of becoming the Final Boss of the Dark Signer arc.
The Egyptian God Cards are still the most popular God cards of all time, with each of them having a large fanbase.
Most of the Elshadoll are named after concepts in Jewish mythology.
The Qliphoth (lit. "peels", "shells" or "husks") are the representation of evil or impure spiritual forces in Jewish mysticism. They are documented in some texts of Kabbalah, a set of teachings originated in Judaism.
Foe Yay: Wynnda and Ariel are frequently paired up by Japanese fans, even though they're from opposing Archetypes in the Duel Terminal storylines.
"Funny Aneurysm" Moment - It's common knowledge that the Yu-Gu-Oh Trading Card Game was inspired by Magic: The Gathering, to the point where some Magic players would refer to it as a ripoff. Now, when you consider some of the rule changes that are going to take effect once Pendulum Monsters arrive (in particular, the rule where the first turn player doesn't enter their Draw Phase) and the fact that there are now "Artifacts" in the game, and you have some Yu-Gi-Oh players now decrying that it's becoming too much like Magic.
Game Breaker - All cards placed the Forbidden List, for one.
The Chaos monsters (Chaos Emperor Dragon - Envoy of the End, Black Luster Soldier - Envoy of the Beginning), which took over the game until they joined their rightful place on the "Forbidden list" that was made for such gamebreaking cards. Additionally, some cards based on the TV show had to be nerfed from their original effects to the point of being near unplayable (Card of Sanctity being a more famous example). These days, Synchros, then Xyzs and now Pendulums are seen as this.
The WickedGodCards are seen as this by many a player who has faced even one.
Butterfly Dagger - Elma + Gearfried The Iron Knight + Magical Marionette. The dagger returns to your hand any time it's destroyed, Gearfried instantly destroys any spells equipped to it, and Magical Marionette gains a spell counter each time a spell is played: the counters increase his attack and can be sacrificed to destroy any one card on the field. By repeatedly playing the Dagger on Gearfried, one can build up effectively infinite amounts of Spell Counters to destroy everything on the opponent's field and gain effectively infinite Attack power. The Dagger was eventually banned because of this. (incidentally, this makes the relatively harmless Guardian Elma nearly useless, as the only way to get her on the field without the dagger is to set her face-down.
A more efficient and consistent combo (and the actual reason why Dagger is banned) is to replace Magical Marionette with Royal Magical Library, which gains a spell counter (max 3) when a spell is played and you can remove 3 counters from it to draw a card. With unlimited draw power, all you had to do was include Exodia and you had a very fast, very consistent F/OTK.
Everyone who play the game during the start of synchro era wil always remember the terror that is Dark Strike Fighter
Six Samurai decks before March 2011 are considered very crazy. After the new banlist, it started to calm down
The major criticism by players against Xyz monsters is the sheer number of cards that will be rendered Game Breakers by it - Gravity Bind, Level Limit, Ultimate Offering, virtually any monster that allows you to special summon copies of itself from the deck...
Hilarious in Hindsight: Necloth of Trishula can be seen as a personification of Trishula. Unfortunately for the Pixiv fanartists, Necloth of Trishula is a guy. Tenpester even mocked it by having the Trishula gijinka's clothes be stolen by Necloth Sorceror.
MST negates. (A common newb mistake is thinking that destroying a card negates its effect.)
OriCa, fan-made artworks which mostly take the form of sexy lolis.
Moral Event Horizon: If not crossed before, the Gishki's attempt to genocide the Gusto with chemical weapons. This was the event which angered the Gem-Knights. Noelia pretty much spends her time dancing on the line.
The Scrappy - A lot of players dislike the Elemental Hero archetype because, being the archetype of choice of Jaden Yuki, they pretty much took over the game for several booster packs, they dominate the fusion mechanic, and have more support and numbers than actual types. This is by contrast with Yugi, who used monsters that were pretty much all over the place in terms of their theme, and Yusei, who does mostly rely on the Synchron and Warrior archetypes, but many of the cards involved are useful for other things besides supporting their own archetype.
Rescued from the Scrappy Heap - Elemental Hero builds are becoming a bit more popular these days, in particular: The Neos Alius/Gemini Spark, Elemental Hero Absolute Zero and Masked Hero builds are potent and are seeing quite a bit of play.
The Utopia Archetype. Have 4 Different "forms", unlike Utopia's precessors, which only have a two or three, several players tend to call hatedom due to Utopia's effect and the way how the creators are giving it more time to shine.
In terms of expansion sets, Cyberdark Impact is almost universally hated, due to having very few cards that were actually useful or competitive.
Shipping: Sangan x Tour Guide From The Underworld, when detaching Xyz Materials was considered as sending cards from the field to the graveyard. The fanart speaks for it.
The "easy" (that's hilarious to call this easy) part about learning "missing the timing" is learning the rundown in that article. The hard part is learning how to recognize which optional effects "can't miss the timing" because they "don't have a timing to miss." Let's just say that the differences between "When" and "If" just got a lot more important.
"Destroy doesn't negate", too...
What about "destroyed and sent to the Graveyard"? specially when you forgot that it had to be "as a result of battle", or "by a card effect"? "controlled by your opponent"?
That was especially annoying with cards that already had a high enough attack so that the only way to destroy them was by card effect. Yeah, I'm really worried about a 5000 attack monster being destroyed in battle.
Especially since it doesn't protect against Light monsters, which are the most likely to gain the necessary ATK to take it down (Master of Dragon Knight, Blue Eyes Ultimate Dragon+equip card and Maha Vailo+multiple equip cards are the most likely means of winding up with an ATK in excess of 5000, and all of them are Light monsters. Heck, any Light monster powered up by Honest will do the trick).
Also, the "Harpie rule"note The Harpie Lady 1, 2, and 3 cards all have the effect of being treated as having the name Harpie Lady—including for deck construction, meaning you can only have a maximum of three of any of them instead of three of each. for those who use them.
Japanese naming and naming changes. Consider Harpie's Brother. He does not count towards the Harpie's Dragon cards, because in the OCG, his name does not contain the word 'Harpie'. Same goes to Frog the Jam, it does not belong to the Frog archetype.
The most well known example of this are the Archfiend cards. Archfiend Cards are known as 'Demon' in the OCG (Not the Type Demon), but since the TCG just couldn't print that, they changed it. A few years later Demons became an Archetype, with cards that support them as such. In the end: All old Demon cards (such as Summoned Skull) became Archfiends, but couldn't have their names changed and while they are treated as such in official games there is nothing on the card that actually says they are Archfiends, so the only way to know that is to look it up on the Internet.
Many reprints of these Archfiend cards now list their status as Archfiends as reminder text.
They Changed It, Now It Sucks - About a number of things. Some argue about changing the original, dark artwork from early packs to lighter, more anime-esque, to the game originally having few Effect Monsters and a ton of Normal Monsters with now-banned Spell Cards being the only salvation against them, to most decks having nothing but Effect Monsters.
Another variation is people who preferred the pre-5D's generations, before things like Synchros and Tuners were introduced.
There are also quite a few people who hate the new Xyz monsters.
The new format of writing card text. Though intended to make things simpler, it ends up making some cards being a cross between Captain Obvious and Colon Cancer. Here's an example for the card Mystical Space Typhoon:
Old Text: Destroy 1 Spell or Trap Card on the field.
New Text: Target 1 Spell/Trap Card on the field; destroy that target.
Other cards can wind up ambiguous and confusing as well. Here's a comparison with Magic Drain.
Old Text: When your opponent activates a Spell Card: Negate the activation and destroy it. Your opponent can discard 1 Spell Card to negate this card's effect.
New Text: When your opponent activates a Spell Card: They can discard 1 Spell Card to negate this card's effect, otherwise negate the activation of their Spell Card, and if you do, destroy it.
Pendulum Summoning. There are players saying the game is Ruined Forever, even when the starter deck that introduces Pendulum Summoning isn't even out yet!
On an additional note, the rule changes that would take effect once the Pendulum Monsters arrive (the player who goes first doesn't enter their Draw Phase on that turn, and Field Spells no longer override and destroy each other) has been met with almost complete scorn.
Another rule change that has also been met with a similar reaction: "Until the End Phase" will now be changed to "Until the End of Your Turn" on several card effects. Cue outrage from Bujin players who used to abuse this to get around effects such as Effect Veiler.