Artistic License: The depiction of the BDSM relationship and scenarios, which bear little relation to real world BDSM practices and relationships, which emphasize the importance of informed consent, negotiation, safewords and safety for all participants under the Safe, Sane and Consensual mantra.
In Chapter 12, when Ana sends an email to Grey saying that she doesn't want to get into BDSM and "it's been nice knowing you," Grey's immediate response is to break into her duplex apartment, tie her up—the only thing he asks permission for—and then rape her into submission. (Despite the fact that Ana has been freaking out over BDSM for several chapters, she claims that the email was a joke. Neither Ana nor her author seem to realize that this doesn't make Grey's actions one bit less horrific.)
He also threatens to punish Ana by raping her in public on two occasions—once when he believes Ana has spoken on the phone to a male friend (she hasn't) and once when Ana refuses an extremely expensive present. His response in the first case is to threaten to screw her in the elevator going from his penthouse to the lobby (when anyone could walk in); in the second case, he threatens to hit her and then screw her on the hood of the car, because she belongs to him, and if he wants to give her Gift X, he WILL
Expy: A lot of characters are similar to their original Twilight templates, with some characteristic of movie actors mixed in: Ana is a clumsy virgin who bites her lip a lot and has an absent-minded mother. Christian is an orphan adopted into a rich family, one of his adoptive parents is a doctor, he plays piano and has a brother and a sister whom Kate and Ethan Kavanagh, blonde siblings, hook up with respectively. Etc ad nauseum.
Fiction 500: Christian Grey owns a yacht, a helicopter, a private plane (complete with attractive stewardess), collects art, and has the resources to fly to Georgia at the drop of a hat just to see Ana.
Not Good With Rejection: Christian Grey AND Ana Steele. Grey breaks into her duplex and rapes her into submission when he receives a rejection email; when Grey refuses to kiss Ana, this is her response (which is straight out of New Moon):
Once underneath the dark, cold concrete of the garage with its bleak fluorescent light, I lean against the wall and put my head in my hands. What was I thinking? Unbidden and unwelcome tears pool in my eyes. Why am I crying? I sink to the ground, angry at myself for this senseless reaction. Drawing up my knees, I fold in on myself. I want to make myself as small as possible. Perhaps this nonsensical pain will be smaller the smaller I am.
"Not If They Enjoyed It" Rationalization: Ana has a number of orgasms during the rape in Chapter 12. This is presented as equaling consent. Apparently Ana's unaware that orgasm can happen during rape—or that it doesn't mean that you've consented to anything. This is also Christian Grey's rationalization in Chapter 16 after he spanks and then screws Ana as punishment for daring to roll her eyes at him, despite Ana telling him repeatedly that, whatever her physical response, she "didn't like it" and "would rather that [he] didn't do it again."
"You beguile me, Christian. Completely overwhelm me. I feel like Icarus flying too close to the sun."
"Placing my head on my knees, I let the irrational tears fall unrestrained. I am crying over the loss of something I never had. How ridiculous. Mourning something that never was – my dashed hopes, dashed dreams, and my soured expectations."
Stalker with a Crush: Christian Grey. Again, he and Ana recognize his stalker tendencies; the narrative simply presents this as romantic.
Therapy Is For The Weak: Christian seems to think so. So does his adoptive family, probably. Seeing as they adopted a deeply traumatised child and never bothered to seek professional help. There is a psychiatrist, but he is only there for exposition.
Title Drop: a rare 3 different titles dropped, Fifty Shades and Master of the Universe being said multiple times and Twilight, referring to the time at night, being said once in the second book.
You Keep Using That Word: Anastasia keeps mentioning that her subconscious is yelling at her, reminding her of something, or something else in that vein. By definition, it's impossible to feel what's going on in your subconscious.
White Man's Burden: Darfur, of all things, is dragged into the book to demonstrate just how rich and generous Christian Grey is.