Awesome Music: The trailer makes good use of a new goth-style and positively eerie redux of Beyoncé's "Crazy in Love".
Canon Sue: Ana not only gets to date a super-hot man. She also gets promoted from secretary to editor one week after being hired, even though she spent more of her working hours emailing Christian than actually working.
Fetish Retardant: The tampon scene. Also, the way Christian speaks of Ana's virginity like an obstacle to be removed.
Hilarious in Hindsight: It was always debatable if Christian's tastes are as "singular" as he claims, considering that even before the Internet BDSM was one of the most common kinks around. Now, when the Fifty Shades books have sold millions and millions of copies and have legions of fans eager to try the stuff in the book, Christian might as well have the Dark Secret that he likes watching porn movies.
The internet went berserk when casting was first announced, and a petition demanding that the current duo be replaced by Matt Bomer and Alexis Bledel gained thousands and thousands of signatures.
Nor were fans pleased when it came out that the book's sex scenes would be "toned down" for the film.
Pacific Rim and Sons of Anarchy fans were not pleased when Charlie Hunman was cast as Christian Grey, citing that he's going end up like Robert Pattinson and creating a bunch of Pacific Rim/50 Shades jokes. But when Hunman backed out, his fandom rejoiced.
Narm: Plenty of it, particularly in sex scenes. For example: "You. Are. So. Sweet,” he murmurs, each word a staccato. For the rest, see this tumblr.
Nightmare Fuel: It's horrifying how many times Ana is struck, raped and/or abused without her consent...and yet this is presented as not only romantic but the a relationship to aspire to.
Padding: The Email conversations and the submissive rules and contract that are printed in the book twice take up a lot of space without adding much content.
Sequelitis: While the series never was a critical favorite, the book Grey—a retelling of the first book from Christian's point of view—has been poorly received even by readers and critics who liked the original trilogy. The two main complaints are as follows:
Too much of the text is copied and pasted from the original book.
Christian's thoughts are banal, and also way too stalker-like. While Christian certainly acted like a stalker sometimes, it's unpleasant to see that he actually feels and thinks like a stalker.
Serial Numbers Filed Off: 50 Shades of Grey started life as Twilight fanfiction, but later became an original work. Readers of both note many remaining similarities between the two works, especially the characterization.