Arc Fatigue: The Ye arc is the longest and considered by some to be the worst arc in the series. Wang Jian's great strategy on Zhuhai Plains is just letting the 5000 trio do their thing, resulting in neverending back and forth between two armies with no definite victories. In the end Zhao generals, instead of exhausting the already starving Qin from a safe distance, just decide to rush on Xin one by one with predictable results. Then the showdown between Xin and Pang Nuan whom readers were tired of seeing and Xin's resurrection that broke Willing Suspension of Disbelief was seen as an Ass Pull. All while Huan Yi does absolutely nothing besides keeping Ye under siege. Many were glad that the politics returned towards the end of the arc.
In chapter 22, Xin manages to escape from a pillory his head was trapped in that the mountain people were using to hold him captive. The justification for the successful escape is that Xin had practiced rope escaping techniques in the past with Piao. However, the only thing that readers ever saw Xin and Piao training at up to this point was sword sparring, and learning how to escape being tied up in ropes is hardly the same thing as your head being locked up in a pillory.
Near the end of Ye Campaign Qiang Lei, after Xin and Pang Nuan do a Mutual Kill, she goes into an actual Afterlife Antechamber and brings Xin back. And she was ready to stay there, but two previously killed minor soldiers bring her back to life in return, reducing the price to just her lifespan. The battle continues like nothing happened, and the commander is even annoyed at the delay. The only lead up to this was Qiang Lei's brief note about qi energy and it's the only use of supernatural in the series besides Mangoku's curse. Then it's revealed that Chiyou have double the lifespan of normal humans anyway, and with conveniently timed arrival of Qiang Li, which quickly results in Defeat Means Friendship, Qiang Lei gets healed, negating any possible problems.
Broken Base: Lacking an official manga translation, the biggest schism in the fandom is whether one prefers the Chinese reading of names (e.g. Xin, Yin Zheng, Wang Yi) or the Japanese readings (Shin, Ei Sei, Ou Ki). The unofficial English scans began with the Chinese readings but switched to the Japanese readings shortly after the first arc when a new translation team took over. The English localization of the anime uses Chinese readings, while the localization of the live action film uses Japanese, further muddying the waters. Usually this boils down to an argument of faithfulness to the source material, versus the aesthetics of the setting.
Creator's Pet: Zhao and Li Mu are often accused of this. While not surprising for Qin's Arch-Enemy and their closest neighbours, Zhao has almost the same number of named generals as other states combined. Li Mu in particular, because he was meant to be the original protagonist, added with the author's habit of inserting Li Mu into various situation where he wasn't historically present, becomes a Spotlight-Stealing Squad, and his status as The Ace can sound like Informed Attribute since he didn't manage to win battles since Mayang, but always get lucky to avoid getting killed. Meanwhile Pang Nuan was often seen as a walking "get out of jail free card" for Li Mu and often considered to be a boring character by the fanbase with no character beyond being "The Strongest", which the author kept for way too long, though it's somewhat lessened after Pang Nuan finally bites it and we got a glimpse of his life.
Huan Yi and Teng. They are so ridiculously popular to the point that fandom pays more attention to their arcs than the main characters.
Wang Jian is similarly popular, thanks to a combination of his historical achievements and his Magnificent Bastard status in-story. Became even more as of late due to his focus as the supreme commander in the Ye arc.
Wu Yi Hu is a chronic loser who is used for a lot of comedy, but him being a Token Good Teammate to Huan Yi's bandits and scoring a few Achievements in Ignorance makes him very endearing both by Qin and readers.
It's the Same, Now It Sucks!: Bi being repeatedly hit by The Worf Effect became tiring to some readers, as for a Qin general he always gets beaten easily to show off the power of the enemy or used as a bait. At the very least, Bi being the one that got to kill Zhao's mountain king calmed down this backlash a ton.
Memetic Badass: Bi is given this treatment as of late due to his achievements in Ye arc.
Memetic Loser: Also previously Bi. He's seen as a punching bag who's used to make another ally look good. Things finally changed for him when he got to score the killing blow on Zhao's mountain king, which readers claimed that this finally redeemed Bi.
Teleporting Armies note Usually as a surprise panel, the author will suddenly show off an army that wasn't spotted previously now suddenly at close range charging forward. The readers went along with this joking that the only logical answer is Offscreen Teleportation.
Scouting doesn't exist. note A continuation of the previous meme where some people just can't seem to understand how army scouts are never able to come across or warn about these armies that appear out of nowhere.
The overall War Is Hell in the manga is shown in full detail when sympathetic-or-not soldiers from all sides get literally cut into pieces.
The treatment Ying Zheng and his mom had to endure at the hands of the scorned Zhao countrymen.
Anything related to the "Changping curse" for that matter (The previous example is partially related to this incident) has some pretty intense imagery.
Qin's generals like Bai Qi (responsible for above mentioned Changping) and Huan Yi, who have no qualms about torturing and mutilating civilians for the sake of Necessarily Evil.
History buffs can only wonder if Ying Zheng will retain his Historical Hero Upgrade till the end.
Rescued from the Scrappy Heap: Due to well-established Character Development, the manga is prone to turn utterly despicable characters into much more likable characters down the line. A prime example is Chengjiao, who grew into a much more respectable member of Qin royalty after seeing Zheng's growth.
It's very hard to find people that actually like Pang Nuan because of his tendency to unexpectedly pop in every now and then when the plot requires a Hopeless Boss Fight to stop Qin from achieving full victory. There's so little to Pang Nuan apart from being a Blood Knight that he's considered to be one of the weakest and out-of-place characters in the series. As a result, it's a common agreement that Pang Nuan is a glorified Plot Device to show Xin what he has to overcome, which he eventually does in the already contested Ye arc and everyone is glad to finally see him go.
Li Mu's Number Two, Hai Yin, fell into this status once Qin's invasion of Zhao got going due to her becoming nothing more than a Satellite Love Interest that just exists to praise and hype up Li Mu. This makes Hai Yin quite irritating to some people as along with people just growing tired of watching her shout Li Mu's greatness in everyone's faces, she appears to have lost the aspects of her character that gave her some character depth, such as showing off as one of Zhao's strategists, or being a Friendly Enemy to Diao.
Seasonal Rot: The Ye arc is considered by many fans to be the worst arc in the series not only due to the fact that Qin's food supply running out was treated as a major plot point only to be completely forgotten about later with no handwave but also the showdown between Xin and Pang Nuan whom they were tired of seeing and Xin's resurrection that broke Willing Suspension of Disbelief and was seen as an Ass Pull. Many were glad that the politics returned towards the end of the arc.
Ship-to-Ship Combat: Xin/Diao vs Xin/Lei. The former have been with Xin for longer and had an Accidental Kiss, while the latter joked about bearing Xin's children and admits to having romantic feelings for him.
Awesome Art: The beautiful graphics are one reason to like the game.
Catharsis Factor: In Two Crowns, you get to blow up the island's cliff portal with a bomb after researching iron technology, letting you get rid of the Greed for good from the island.
Even Better Sequel: This is what many fans have felt about the two sequels to the original Kingdom game. New Lands adds seasons and traveling to other islands, and Two Crowns lets two players play together, as well as iron technology and multiple quality-of-life improvements from feedback about previous games.
The blood moon. The music gets eerie, and the Greed are swarming from one side, and you can only hope that you'll make it past the night that doesn't end before the entire wave is killed. Fortunately, the next day will be a truce where the Greed temporarily don't attack.
The crown stealers. When you hear them coming, have hope because not only are they faster than almost all mounts, they're also going straight for your crown, ignoring what's in your purse and any hired peasants.
That One Puzzle: The Loki puzzle in the Two Crowns Norse Land campaign. The other puzzles are pretty straightforward, are activated with coins or gems, and have some form of hint or feedback to nudge players in the right direction. Activating Loki's puzzle requires letting an enemy knock the monarch's crown off, which is a Violation of Common Sense when the Greed stealing the crown is a Game Over. Even if the player knows what to do, actually getting the crown to fall to the right location is tricky, with a degree of randomness and a high risk of the crown being stolen if the trajectory is wrong. The alternative is to try to get hit by the winter boar instead of the Greed. While the boar can't steal the crown, getting the boar to hit the monarch near the statue can be a Luck-Based Mission in itself.
