Paul Gadzikowski

Since I don't actually believe in canon, it took me awhile to come up with ten.

1. Rose and Mickey went to bed together for the last time between School Reunion and The Girl in the Fireplace, and realized it was over between them, and that's why Rose's reluctance to have Mickey aboard the TARDIS vanished between episodes. Though obviously not all Mickey's resentments did.
2. Skaro is Dalek for home. To everyone else it means the Dalek origin planet, but to a Dalek it means the capital planet of its faction. It was only Davros' faction's home planet the Doctor destroyed in Remembrance of the Daleks.
3. Both versions of Shada happened. It was necessary for the events to be lived over because Borusa unwound them when he stuck the Timescoop in and lost control of it. (This fix is so not mine that until recently I misremembered that it was worked into the script of the second version.)
4. Of course the Doctor's half human. That's why there's no evidence he has a second heart till he's regenerated twice. Duh.
5. The Doctor used the call to Gallifrey as an excuse; he really dropped Sarah Jane off home in Aberdeen because he thought he'd try dumping a companion once instead of waiting to be dumped, and if he didn't like it better he wouldn't do it again. He hasn't done it again.
6. Time Lords reproduce in the lab and suppress the pairbonding instinct societally, genetically and medically. Time Lords have family and domestic lives that the mainstream viewing audience would find normal. Also (just an observation, not a "personal canon"), what the Doctor answered Martha about the Master being his brother in Utopia was not semantically responsive, and - particularly in this personality - the Doctor is rarely semantically unresponsive unless he's hiding something.
7. The Master we saw during the UNIT years, then saw all decayed on Gallifrey and Traken, then saw subsuming the bodies and lifeforce of Tremas and of Bruce the ambulance driver (among, no doubt, others) - all that was one personality, his thirteenth. By whatever means the Master managed on the occasion of the Time War to acquire another regenerative cycle, Professor Yana was only the second incarnation of the Master we'd ever seen, and Harold Saxon only the third. Except, really the fourth and fifth, because the Monk and the War Chief also were the Master. Everyone who argues that the Monk and/or the War Chief can't've been the Master because their personalities were too different from his can thank Davies and Simm for tanking their argument.
8. Remember the Lois & Clark episodes with H.G. Wells time-travelling? That was actually the Doctor (and "Tempus" was actually the Master). A different incarnation in the middle of his three episodes than in the others, too, if you were paying attention. Also there's no such person as Zathras. And it wasn't Lorne who warned Angel about the postgraduate student plotting to stop time. And...
9. Susan is still alive.
10. The reason the Doctor and Peri still traveled together after he regenerated despite how poorly they got along most of the time was just because the sex was that good.