I have to admit the thieves guild is kind of annoying. For me to become guild master I have to do 5 jobs + special guest in each city. I finished Whiterun and Windhelm and let those two assholes keep sending me back to those two cities. Plus, I have to pull jobs in Rifton which doesn't amount to shit because the thieves guild already has the backing of Mavin Black Briar.
You forget that this isn't just some brutal sport where everyones out to kill each other. Its much more like a game of physical chess.-looney liam