MASTER: Ah, Doctor! Look at us! Two brilliant minds! We make such a great team together! Why did it have to sour so badly? What set us so far apart?
DOCTOR: You went mad, remember?
MASTER: Oh yes! That’s right.
If you’re a Doctor Who fan – and in particular if you’re a fan not just of the revived 2005 version but of the original classic series as well (because otherwise you’re not going to get a lot of the references) – then I highly recommend Rich Morris’s fan comic The Ten Doctors, which brings together the Doctor’s first ten incarnations (as well as just about every supporting character you can think of) and does a very nice job of capturing the distinctive voice of each one.
You can read it online or download it in various formats.
(Don’t skip the deleted scenes in the Appendix! I particularly like the one with Leela and the Valeyard, which I would have been happy to see left in.)