Is a fictional world really better?

Found a wonderful blog today . . . http://franceshunter.wordpress.com (which was a meme from http://imlostinbooks.blogspot.com) where she commented on three fictional worlds in which she would like to live.  Hers were exceptional as she is a historical fiction author and had steeped herself in the worlds of her research and writing.  Equally interesting were the comments, with many opting for fantasy worlds and in particular Narnia.