Have you ever been kept awake until 2 in the morning having an imaginary conversation with one of your blog readers who thinks you're great and left a long comment telling you so? Or spent hours obsessively trying to figure out how to do better work, spurred by a fan letter from a customer about the terrific job you did? Or is it maybe more likely that your late-night solo conversations and obsessive problem-solving go to the trolls , the complainers,