Adventures in Time and Space was lovely and a little heartbreaking.
The Five(ish) Doctors is brilliant and hilarious and I'm going to have to watch it a dozen times to catch all of those cameos. It's really impressive, the people willing/wanting to be part of that!
Night of the Doctor was unexpected and fascinating.
And ah... Day of the Doctor, there is so much to say!
It took 2 viewings for my opinions to settle down, because I spent most of the first watching wondering where Nine should be shoehorned in instead of Hurt (8.2?) and the second one just catching all the bits I'd missed.
I have a new favorite Doctor and he only has one outing! Not even Big Finish is going to be able to give him more adventures.
Rose Tyler's return would have amazing amounts of baggage with it. Billie's return like this, though, was brilliant. Especially with the reference to Bad Wolf, because it was the Bad Wolf that erased daleks throughout time and space until RTD needed the next season ender. Of COURSE Bad Wolf would be at the fall of Gallifrey! (Even closed captioning called her "Rose's Likeness" not Rose.)
"Geronimo!" "Allons-y" "Oh good God." That will never not be funny. Never.
The backstory on Elizabeth I is completely mixed. The woman who had flaming arrows shot at "my worst enemy" in The Shakespeare Code is not going to leave old orders for him to curate her secrets lying around. I can handwave because this was so good, but this is really mismatched canon. (BBCA's idea to air the utterly contradictory End of Time between showings of Day of the Doctor only point out the internal canonical contradictions.)
I know that there has been voiced frustration about the lack of classic Doctors in the 50th (although now we know what was behind the stories of Davison picketing the BBC.) And I can understand the actors' point of view. But I think the show did acknowledge their contributions, ALL their contributions. The clips of the many Doctors (including Capaldi). The semi-still shot at the end. The credits! I squeed loudly at the credit for the Doctor.