Quiet or Noisy?

Which one you prefer? A quiet office or a noisy one? Most of the time, I prefer a quiet one. I can't think or concentrate when it's very noisy that is why I prefer working in a quiet office. But sometimes when I'm very sleepy or I have nothing to do, I will prefer a noisy office. At least the noise can keep me awake mar.. hehe...

What about you? Quiet or noisy office?