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.
Is Maxim a villain, hero or anti-hero? Is everything Maxim says about Rebecca true? Do Maxim and the Second Mrs de Winter get a happy ending or not? All open to interpretation.
A minor one regarding Mrs Danvers's trick on the heroine. Was tricking her into dressing up as Rebecca just a Kick the Dog moment as revenge for being stood up to? Was she hoping to remind Maxim of the love she thought he felt for Rebecca, further ruining the new marriage? Or was it some way for her to get to see Rebecca (or someone who resembled her) one last time?
The second Mrs de Winter staying with Maxim after finding out he's responsible for Rebecca's death. Does she truly love in in spite of it? Or is she realising her best chance for comfort is staying with him - since she's an orphan and has no other family to speak of?
Award Snub: The film is one of the few films which won the Best Picture Oscar without the film's director also winning Best Director. Presumably this was because Hitchcock was a relative unknown in the US at the time, or because the film's producer David O. Selznick had a reputation for having a high degree of creative control over the films he produced, often essentially directing the films himself.
The new Mrs. de Winter's response to learning Maxim de Winter killed Rebecca? "He never loved her and says he loves ME — let's help this poor woobie husband of mine so we can never speak of this again!" and she then agrees to help him.
It was suggested elsewhere that Rebecca was just as much of a bitch as Maxim says she is. Beatrice walks on eggshells on the topic because she knew that Rebecca seduced her husband, Mrs. Danvers openly talks about how Rebecca took advantage of men and laughed about it, and the end makes it pretty clear that she was pushing Maxim's buttons for him to shoot her. Granted, the second Mrs. de Winter didn't know that last bit when Maxim confessed to the murder, but then most of her issues stemmed from Mrs. Danvers saying over and over "Oh, you're just someone pathetic that Maxim felt sorry for; he still loves Rebecca."
Hilarious in Hindsight: Favell tried to break up Maxim and Rebecca's marriage. Fast forward to All About Eve where George Sanders (who plays Favell) expresses disgust that Eve plans to break up Karen and Lloyd's marriage.
Les Yay: Implied (much more heavily in the book) to be a major component of Mrs. Danvers' devotion to Rebecca.