History YMMV / MySistersKeeper

* TheWoobie: Kate herself, through and through. Also, her sister, Anna.

* {{Wangst}}- Sara. A lot. All she ever talked about from when Kate was diagnosed to when Anna sued them was how sick Kate was. [[LampshadeHanging Lampshaded]] when her sister Zanne says, "You can't be a martyr all the time," and Sara mistakes her for saying "You can't be a mother all the time."

* BaseBreaker: Whether the book or the film's ending is better is a massive point of contention.

* TheScrappy: Sara.

* Whether the book or the film's ending is better is a massive point of contention.

*** Outright admitting that she's given up on Jesse in the narrative, dismissing his emotional claim that she "doesn't know what it's like to be the kid who's sister is dying of cancer" by saying her experience as the mother of said child trumps his. She also accuses him of being a drug addict, only to be shocked into silence when [[spoiler: he angrily explains that the injection marks are from donating platelets for Kate.]]

* DiabolusExMachina / ShockingSwerve: After [[spoiler: winning the case, Anna is killed in a car accident and ends being brain dead. Her kidney is donated to Kate, rendering the whole thing pointless.]]
** Averted in the film. [[spoiler:Kate dies with dignity and Anna lives.]]

* HilariousInHindsight: A girl named Anna with an older sister who needs a lot of attention and care. [[{{Disney.Frozen}} Gee, that doesn't sound familiar at all.]]

** Jesse's motivations. [[spoiler: he was almost completely ignored after Kate was diagnosed and Anna was born because he wasn't a match for Kate, and ended up destroying things because he'd never been able to fix them.]]

* ShockingSwerve: After [[spoiler: winning the case, Anna is killed in a car accident and ends being brain dead. Her kidney is donated to Kate, rendering the whole thing pointless.]]

* {{Fridge}}: We assume that Anna is the narrator in the prologue and it is Anna who tried to kill her sister Kate when she was three years old. [[spoiler: It is actually Kate. The only other time she narrates is at the end. Note the use of the italics]].

* ShockingSwerve: After [[spoiler: winning the case, Anna is killed in a car accident and ends being brain dead. Her kidney is donated to Kate.]]

* {{Wangst}}- Sara. A lot. All she ever talked about from when Kate was diagnosed to when Anna sued them was how sick Kate was. [[LampshadeHanging Lampshaded]] when her sister Zanne says, "You can't be a matyr all the time," and Sara mistakes her for saying "You can't be a mother all the time."

* TheWoobie: Kate herself, though and though. Also, her sister, Anna.

* TearJerker: [[spoiler: In the movie Sara breaking down in front of Kate and Anna's narration telling us that Kate died that night]]

*** Sara's complex penetrates deep enough psychologically that it impacts even Kate. In a very telling scene in the novel, Kate, frustrated and overwhelmed by the constant regime of recurrent hospitalization, declares lucidly that she's had enough of it all. Instead of approaching her to speak honestly about it, Sara states with startling vituperation that it's "[Kate's] suicide."

*** Sara's complex penetrates deep enough psychologically that it impacts even Kate. In a very telling scene in the novel, Kate, frustrated and overwhelmed by the constant regime of recurrent hospitalization, declares lucidly that she's had enough of it all. Instead of approaching her to speak honestly about it, Sara states with startling vituperation that it's "[Kate's] suicide."
* YourMileageMayVary: An emotionally-driven and complex master piece that deconstructs tropes like IllGirl and MamaBear, among others? An emotionally-manipulative literary/cinematographic tripe with bunch of whiners as character and [[spoiler: a '''stupid''' WhamEpisode as an ending]]? You decide.

* CompleteMonster: Sara, arguably, while under the auspices of being a WellIntentionedExtremist.

*** When Brian, the father, gives Anna the locket she pawns earlier in the book, Kate justifies shock at seeing him reward Anna's gift of marrow as (paraphrasing) "not occuring to her that suffering was worth rewarding, since they'd all been through so much of it." This is after she nearly refuses to see Anna after her operation (a very painful one, at that), claiming that she's too busy with Kate.

* YourMileageMayVary - To some people, a TearJerker par excellance. To others, the mother and father of all emotional cheap-shotters. The movie adds another layer of argument - some hate the changes, some greatly prefer them, the ending being the ''big'' one.

* ShockingSwerve: After [[spoiler: winning the case, Anna is killed in a car accident and ends being brain dead. Her kidneys are donated to Kate.]]
** Averted in the film. [[spoiler:In the film, Kate dies with dignity and Anna lives.]]

* {{Wangst}}- Sara. A lot. All she ever talked about from when Kate was diagnosed to when Anna sued them was how sick Kate was. [[LampshadeHanging Lampshaded]] when her sister Zanne says, "You can't be a mother all the time," and Sara mistakes her for saying "You can't be a ''martyr'' all the time."
** It was actually the other way round. Zanne said "You can't be a martyr all the time," and Sara mistakes her for saying ''mother''.