I have to say I'm a touch envious.
I was an Army Brat who was introduced to The Doctor when I was about 9 years old, when we went on a 1 week trip to London and I bought a stack of the books to read in the hotel room. I finished them before we got back home.
As we moved as a family (or later, as I traveled for school), I got to see the movie with the first Doctor, some Pertwee episodes, and almost all of the Tom Baker stuff, but only a few from earlier and later Doctors until the "New Who" shows. Result: some of the series history is completely unknown to me, like the Valeyard.
The Valeyard was a Colin Baker villain. The Doctor was on trial by the Time Lords for interfering with history, and the prosecutor was the Valeyard. Turned out at the end that he was a future incarnation of the Doctor ("between his 12th and 13th incarnations").
He has his own wikipedia page: http://en.wikipedia.org/wiki/Valeyard