I'm surprised that no one has come in to comment yet on Tom's answers. This month is already starting off with a gold mine for answers. XD
Tom Baker is right, just because a director says something does not make it so. I feel that John Nathan Turner and directors after him have had too much influence on the series rather than allowing the Doctor and the writers to make the calls. Such as Turner's goal to remove Tom Baker, to put the sixth into the brightly colored 'suit.' The Time War of course which allows the new directors to deny any previous statements, actions, and events from previous doctors in old who. Then, the Doctor's Daughter, the new master, etc, etc. Even Steven Moffat goes into this territory at times, having stated that the Doctor is confused too the point that he doesn't even actually know his own age, Tardis explosion = end of universe...
I like listening to Pertwee and Baker when they reflect on their tenure. There is so much life and energy to it, especially when they were powerful forces of creation with lots of input themselves.
Tom Baker's last line was very well made and very dramatic, at least for me. Though Tom's suggestion sounds every bit as awesome and would've been an excellent introduction to Peter Davidson. I'm left to shrug on which one would have been better.
I notice that this is my 2nd rant, 3rd rant, so this will be my final one. I don't want to offend supporters of the various directors which ranting can.
Si-Fy and Fantasy, that is where my heart lies. To Doctor Who and its 18 years of brilliance, still waiting on the 50 yr anniversary!