This show has been around for so long that the 'satanic powers' bit became dated, then became relevant again when the Doctor killed the one true Satan.
If all the Doctors landed the TARDIS in my yard at the same time and opened their doors to me, I'd run to Pertwee with great awkward apologies to Sylvester McCoy.
While I probably enjoy Baker, Tennant and the new guy more (just entertaining to watch) I have to say I love how Pertwee stayed in character off screen, even going to the extent of having a custom made car for personal appearances.
Then again, he was probably just crazy, like a British version of the Lone Ranger.