I don't think it's just him, sadly. I tend to slip in references with a lot of Doctors, especially to B5. Most of them no one ever get, which makes me a sad panda. I think the Shadow War is what I slip in the most though, and most people probably assume I'm going off on the Shadow Proclamation or something. Though I do get in a few Interstellar Alliance cracks occasionally as well. Thing is, B5 makes such good reference material. It all sounds futuristic and political. XD

Of course the Master doesn't need to sleep. He also hates having to show that he cares enough about the Doctor not sleeping to lock him in the closet, so he gets very annoyed for a while after.

Beware the cluebat, Doctor...