History YMMV / ThatTimeIGotReincarnatedAsASlime

* PortmanteauSeriesNickname The Japanese name of the show '''Ten'''sei Shitara '''Sura'''imu Datta Ken[[note]]転生したらスライムだったけん[[/note]] is often shortened to [=TenSura=] which has begun to be used by American fans as well alongside [[FanNickname Reincarnated Slime]] as an alternative to the lengthy title.

* PortmanteauSeriesNickname The Japanese name of the show '''Ten'''sei Shitara '''Sura'''imu Datta Ken[[note]]転生したらスライムだったけん[[/note]] is often shortened to TenSura which has begun to be used by American fans as well alongside [[FanNickname Reincarnated Slime]] as an alternative to the lengthy title.

* UnnecessaryMakeover: Some fans were not pleased that the "evolution" of the ogre characters made them [[BishonenLine look more human]], taking away their more notable features, decreasing the size of their horns and in general being seen as a ''downgrade'' in appearance via making them more conventionally attractive. Shuna and Shion get hit with this the hardest, going from [[https://static.wikia.nocookie.net/tensei-shitara-slime-datta-ken/images/d/d6/Shuna_Ogre_Anime_1.png/revision/latest?cb=20181215102539 distinctive]] [[https://forum.novelupdates.com/attachments/shion-1-png.38298/ designs]] to a [[https://vignette.wikia.nocookie.net/tensei-shitara-slime-datta-ken/images/8/87/Shuna_Anime.png/revision/latest/scale-to-width-down/272?cb=20180924171023 cute girl with horns]] and a [[https://s1.zerochan.net/Shion.%28Tensei.Shitara.Slime.Datta.Ken%29.600.2341512.jpg sexy girl with a horn.]]

* {{Narm}}: From the movie: Queen Towa is a kind woman who uses a powerful cursed tiara to cure the land of poison, which sickens her in return. The name of this powerful, dangerous item? The ''Ugly Tiara.'' This makes the scene when Towa invokes its power to save the one she loves unintentionally hilarious, as it sounds like she's begging her butt-ugly tiara to grant her a miracle.

* Narm: From the movie; Queen Towa is a kind woman who uses a powerful cursed tiara to cure the land of poison, which sickens her in return. The name of this powerful, dangerous item? The ''Ugly Tiara.'' This makes the scene when Towa invokes its power to save the one she loves unintentionally hilarious, as it sounds like she's begging her butt-ugly tiara to grant her a miracle.

** More generally, Rimuru has on multiple occasions in the main and spin off series ''SlimeDiaries'' commented on multiple male characters such as Soei and Benimaru being dreamy and other such compliments.

* More generally, Rimuru has on multiple occasions in the main and spin off series ''Anime/SlimeDiaries'' commented on multiple male characters such as Soei and Benimaru being dreamy and other such compliments.

* UnnecessaryMakeover: Some fans were not pleased that the "evolution" of the ogre characters made them [[BishonenLine look more human]], taking away their more notable features, decreasing the size of their horns and in general being seen as a ''downgrade'' in appearance via making them more conventionally attractive. Shuna and Shion get hit with this the hardest, going from [[https://i.ytimg.com/vi/UujKNjd9p84/maxresdefault.jpg distinctive]] [[https://forum.novelupdates.com/attachments/shion-1-png.38298/ designs]] to a [[https://vignette.wikia.nocookie.net/tensei-shitara-slime-datta-ken/images/8/87/Shuna_Anime.png/revision/latest/scale-to-width-down/272?cb=20180924171023 cute girl with horns]] and a [[https://s1.zerochan.net/Shion.%28Tensei.Shitara.Slime.Datta.Ken%29.600.2341512.jpg sexy girl with a horn.]]

** Right from the start Veldora Tempest was massively loved for his entertaining LargeHam persona and {{Tsundere}} attitude towards any form of companionship, with many heavily anticipating when he would break his seal and join the bigger cast, placated by the occasional appearances from inside Rimuru's stomach. When he finally made his grand return, the love for him ''exploded'' due to him becoming an {{Adorkable}} geek who basically ''lives'' the fantasies of the readers through using techniques from various other Japanese stories, like ''Manga/DragonBall'' and ''VideoGame/StreetFighter''. Helping matters is that his appearances are sporadic enough that his overwhelming personality never gets tiring.

%%** "What? No response?"
%%* {{Moe}}:
%%** Rimuru, in both his base slime and human forms.
%%** Milim Nava the TokenMiniMoe Demon Lord.

** In the second season, Rimuru is devastated when he sees the corpses of over a hundred of his citizens due to an attack by [[spoiler: the country of Farmus]]. The next episode, an already grieving Rimuru is floored when he is lead to [[spoiler: Shion's]] dead body.

** The goblins all look adorable for a monster race before going to the BishonenLine. Special mention goes to Gobta for having the least change aside from perhaps a slight height increase.

* UnnecessaryMakeover: Some fans were not pleased that the "evolution" of the ogre characters made them [[BishonenLine look more human]], taking away their more notable features, decreasing the size of their horns and in general being a sharp ''downgrade'' in appearance making them more conventionally attractive. Shuna and Shion get hit with this the hardest, going from [[https://i.ytimg.com/vi/UujKNjd9p84/maxresdefault.jpg distinctive]] [[https://forum.novelupdates.com/attachments/shion-1-png.38298/ designs]] to a [[https://vignette.wikia.nocookie.net/tensei-shitara-slime-datta-ken/images/8/87/Shuna_Anime.png/revision/latest/scale-to-width-down/272?cb=20180924171023 generic cute girl with horns]] and a [[https://s1.zerochan.net/Shion.%28Tensei.Shitara.Slime.Datta.Ken%29.600.2341512.jpg generic sexy girl with a horn.]]

* HilariousInHindsight: Both this and ''LightNovel/GoblinSlayer'' were both released as anime adaptions almost a week apart, and fans have already made comparisons with the two as they both feature goblins. On ''Goblin Slayer's'' we have [[AlwaysChaoticEvil wicked]], [[UglyCute ugly]], [[{{Sadist}} sadistic]], and [[HatesEveryoneEqually spiteful]] goblins. On ''Slime's'' end we have friendly, [[BishonenLine attra]][[CuteMonsterGirl ctive]], [[CowardlyLion timid]], and noble goblins. People who have already seen the NightmareFuel of the first episode of ''Goblin Slayer'' and then see the second episode of ''Slime'' when the goblins are introduced experience a total MoodWhiplash on how goblins are depicted in the two very different series. Fans have even jokingly wondered about what [[FanNickname GS]] would do if he finds that the ''Slime'' goblins are nowhere near as twisted as the ones he's used to dealing with.

** Goblin Smasher.[[labelnote:Explanation]]After Rimuru saves the goblin village and causes them to cross the BishonenLine by giving them names, this meme popped up due to how [[{{Fanservice}} sexy the male and especially female goblins become]]. Tying into the ''LightNovel/GoblinSlayer'' FriendlyFandoms, it also resulted in plenty of jokes to how the ''GS'' goblins need females in their race to turn good, or how [[FanNickname GS]] himself would go from slaying goblins to "laying" them.[[/labelnote]]

** Great Sage, analysis[[labelnote:Explanation]]The ability of Rimuru's Great Sage skill to analyse any substance , creature and situation Rimuru comes across has prompted parallels in the comments to the "[[WesternAnimation/{{Madagascar}} Kowalski, analysis]]" meme[[/labelnote]]

** With ''LightNovel/GoblinSlayer'', both receiving anime adaptations during Fall 2018 season and both featuring [[OurGoblinsAreDifferent radically-different depictions of goblins]].
** With ''LightNovel/{{Overlord}}'', as many ''Overlord'' fans hopped on board with this series during the wait in between seasons and got a similar albeit more lighthearted experience.
** With ''LightNovel/IveBeenKillingSlimesFor300YearsAndMaxedOutMyLevel'', due to the premise of two overpowered reincarnated protagonists wanting to eke out a peaceful prosperous life for themselves and their loved ones. Also, the inevitable jokes about what would happen if Rimuru (a slime) and Azusa (a witch known for killing slimes) were to meet.
** With ''LightNovel/SoImASpiderSoWhat'', due to ''Slime's'' second season airing around the same time as the latter's debut along with the comparisons between the two protagonists being reincarnated into forms usually thought of as non-threatening but making gains to becoming among the strongest and most dangerous beings in their respective worlds, along with their hilarious exploits along the way.

* CatharsisFactor: After all the machinations that Clayman subjected Tempest to, especially orchestrating the Falmuth Kingdom's massacre, it's a treat watching as over the course of the second half of Season 2, Tempest finally strikes back, destroying his army, raiding his kingdom, eliminating or freeing each of his top subordinates, and topping it all off with Rimuru personally finishing the OutGambitted Clayman off.
** Speaking of which, witnessing Kyoya and Shogo get utterly annihilated in their rematches with the good citizens of Tempest after what they did was nothing short of deeply satisfying.

* {{Moe}}:
** Rimuru, in both his base slime and human forms.
** Milim Nava the TokenMiniMoe Demon Lord.
* SignatureScene:
** For Season 1, the scene where Rimuru [[spoiler:assimilates the dying Shizue]] and takes on his human form for the first time.
** Season 2 has several noticeable contenders
*** Tempest's RoaringRampageOfRevenge against the Kingdom of Falmuth for all those senselessly killed by them. Standout moments include Hakurou vs. Kyouya, Geld's NoHoldsBarredBeatdown on Shougo, and finally Rimuru [[spoiler:massacring the 20,000-strong Falmuth army]].
*** The scene where Rimuru [[spoiler:completes his Harvest Festival to become a True Demon Lord, paired with the newly-ascended Wisdom King Raphael reviving those killed by Falmuth, including Shion.]]

* StrawmanHasAPoint: The Kingdom of Falmuth has ulterior motives for the attack on Tempest, but the Holy Church doesn't. They genuinely see an unchecked nation of monsters as dangerous. Given [[KillEmAll Rimuru's response]] to their invasion, it's hard to deny that their fears are not unfounded. Rimuru is generally benevolent, so their blind xenophobia is completely wrong, but a malicious creature with his power and potential for limitless growth could easily conquer the world. Rimuru even ''ackowledges'' this in the aftermath, which is why he's so keen to actually sit down and have peace talks with them so they can discuss things.

** With ''LightNovel/IveBeenKillingSlimesForThreeHundredYearsAndMaxedOutMyLevel'', due to the premise of two overpowered reincarnated protagonists wanting to eke out a peaceful prosperous life for themselves and their loved ones. Also, the inevitable jokes about what would happen if Rimuru (a slime) and Azusa (a witch known for killing slimes) were to meet.