I'm not offended, but I do think this question is so subjective as to become irrelevant. I don't think my opinions should carry such weight, on one hand, but on the other, I would not give anything such an extravagant rating. It's not telling anyone why I liked it.
I can only speak to things that please me. I like plot. I like complexity and authors that are in love with language. I like authors that respect and stay as close to canon concepts as possible, and who do not write a character so out of character as to be unrecognizable. I like dialogue that's realistic and fluid. I like authors that bother to research things they write about. I like authors that grasp that "adult" does not mean pornographic or filled with gratuitous violence. I like authors that don't feel the need to spoon feed me every detail, who encourage me to use my own vivid imagination and who paint word pictures capable of allowing me to do just that.
Obviously, if someone is only looking for something light, or just some PWP, my rating isn't going to help them very much.