Azul-din
Troubadour
Oh by all means include them, if it suits your personal taste. My point was, that what is crucially important is that you, the writer, have all of this detail in your mind as you write. Tolkien was very good at this, dropping bits of information which melded seamlessly into the narrative, as in Strider's conversations with the Hobbits, drawing on a whole history which in the end he couldn't resist writing down separately. As Hamlet says, though, 'the Play's the thing'."No one" is overstatement. I hate it when the works don't have "worldbuilding notes" included, be it as appendices a la Tolkien, or separate books a la Martin.