I really wanted to use as many different incarnations of the Doctor as possible. As it is I only managed 6 out of 10. 10 got three cameos, cheeky bugger.

Honestly I've only watched 9 and 10, the 8 movie, and 'The Five Doctors'. That's it. Most everything else, (and you'll notice that 4 and 7 have some of the shortest parts) I gleaned from fanon. st_aurafina added the little nuances to 3, 7 and Ace that really helped.

So, it's gratifying to hear that people enjoyed it. Thanks!