I think the tendency to over-explain and over describe is one of the most common failings in fantasy. It's an unfortunate piece of Tolkien's legacy. Don't get me wrong, Tolkien was a great worldbuilder, but he got a little caught up describing his world at times, at the expense of the overall story.
Patrick RothfussAlso, worldbuilding touches all aspects of your story. It touches plot and character as well. If you don't know the culture your character comes from, how can you know what he's really like? You must know your characters on a much deeper level than you would if you just shrugged your way into a cookie cutter fantasy world.
Patrick RothfussOne reason we love fiction is because stories have a comforting shape. They provide a resolution that's lacking in our regular lives.
Patrick RothfussHow about this?' Simmon asked me. "Which is worse, stealing a pie or killing Ambrose?" I gave it a moment's hard thought. "A meat pie, or a fruit pie?
Patrick Rothfuss