What sets Nora Roberts apart from all others?

Actually, at the moment i'm reading one of her books... Its really good, unlike anything i've read... Shes really good with plots and making you feel like u really know the characters... Shes really good and I love to read her books..but i have other favorites to who are not that far behind....|||She can write really fast! I love her books but there are other authors who are just as good if not better, but they can't write as fast so they aren't at the top of the list all the time.|||Her story lines are interesting and she gets readers to care about the characters in the story.|||She is a great story writer...She appeals to the happily-ever-after reader that likes some meat to her story. But, unlike other romance biggies, she doesn't inject a lot of sad-before-the-happy plots.....