I've tried to read book one just to see what all the fuss was about and ended up quitting halfway through because of both the bad writing (not being able to use the word vagina and instead constantly referring to it as "down there" and let's not forget about the very conscious subconscious and the inflation of the word "post-cotial") and the obvious glorification of abuse as something sexy and desirable.
The protagonist has no character strength whatsoever, Christian Grey is an abusive stalker only interested in his own pleasure with absolutely no regard to his partners feelings or sexual satisfaction. He forces himself on her in her dorm room after she wants space. There is nothing romantic about this series. EL James' portrayal of BDSM is an insult for anyone actually into this kink.
Jamie Dornan, who plays Christian, said himself that for that movie he had to do things he would never, ever, do to a woman. In those interviews it seems like the whole acting experience for this movie was a rather uncomfortable one.
For more on the abuse in 50 SoG, there is a great tumblr post right here:
https://theramblingcurl.blogspot.de/2014/02/fifty-abusive-moments-in-fifty-shades.html
There is really wonderful fanfic out there, some worth publishing. And then there was "Master of the Universe". There is a Once Upon a Time fanfic about to be published which I have read and found a very nice read and which makes a much better example for fic worth publishing.