I grew up with HP books, I loved them and as you said, movies disappointed me very much. usually I prefer books than movies. Unfortunately, I liked " the lords of rings" movies , but I can't read the books. I've tried more than one time, but... it wasn't page turner!
I haven't read " fifty shades of Grey", I know it, it's very popular but people told me that is " weird". so now I'm undecided if read it or not.