If someone insists on pronouns, I just don't refer to them by pronouns. they only get their proper name, since they are so special and need everyone to know it. If for some reason i'm talking about the same person multiple times, it slows down the conversation so much that it really begins to grate on people, not because of me but because of the individual. Granted, I have not had many encounters with transtrenders since I moved out to the rural area, but it worked quite well back in the big city.