David Tenant was the best Doctor

I thank Con for the opportunity to debate this. As mentioned earlier, I will be vouching for Matt Smith, also The Eleventh Doctor or D11, as I shall constantly refer to him throughout the rounds. My sources will be episodes and named in the main part of my commentary. Quality of Acting The big thing that is in favour of D11 is that ultimately the guy made Doctor Who fun again, after a lull of at least two seasons and the specials, and arguably displayed a greater display of acting in one season alone than what D10 managed collectively in three seasons and a bunch of specials. For starters, I would implore anyone who doubts D11's comic superiority to watch the opening moments of The Eleventh Hour alone, where D11 is in the opening stages of his post regeneration nature and is trying to find out precisely what he likes, leading to the hilarious cloud cuckoo-lander combination of fish fingers and custard. Beyond that, I would also appeal to any of the episodes D11 did with comic genius James Corden, where the two bounced off of each other amazingly. Beyond this, there's also his excellent delivery of sometimes angry, sometimes forceful speeches, be they badass boasts or Reason You Suck speeches (see TV Tropes for details on this trope). Case in point again, The Eleventh Hour, where D11 stops the monster from destroying Earth simply by introducing himself, and likewise in the Pandorica Opens where he at least temporarily does the same to his enemies. Or in the absolutely amazing Weeping Angel episodes of Series 5, D11 boasts to the Weeping Angels that the one thing they should never ever put in a trap is HIM. And then of course, how he defeats the Silence in Day Of The Moon by telling them how they've essentially self-defeated themselves by causing humans to become aware of their existence. Beyond this, there's also sadness. D11 produces truly heart-wrenching scenes as he prepares to sacrifice himself in both The Big Bang and The Wedding of River Song, ESPECIALLY in the latter where he learns about the death of the Brigadier. And then there's pretty much the entirety of The Doctor's Wife and his heartwarming interactions with the TARDIS (or "Sexy" as he calls her) in human form as well as the really emotional scenes when Sexy says goodbye to the Doctor. Let's not forget the implications of D11 revealing the extent of his self-hatred when he reveals he was the actual Dream Lord, and of course his really heartfelt goodbye to Amy in The Angels Take Manhattan. Overall, I believe D11 more adequately covers the "acting" ground. D11's achievements As impressive as the list may sound for D10, why don't we look at what D11 has achieved? As mentioned before, he chases away an alien force in the Eleventh Hour simply by talking about how the Earth is protected by him, and also helps expose Prisoner Zero with no TARDIS and nothing but a broken screwdriver and twenty minutes to spare. Let's also not forget that D11 did what D10 didn't, and that's manage to survive bombardment by pretty much an entire army of Weeping Angels in Flesh And Stone AND escape with both himself and Amy and River alive. He also finds a way of escaping from a seemingly inescapable prison of the Pandorica in The Big Bang, and THEN after performing a heroic sacrifice that saves his friends when he re-enters the Pandorica in order to fly it into the TARDIS explosion, he manipulates events so that he can be successfully recalled back into EXISTENCE. He has also defeated The Silence twice despite the advantage they hold of making people forget about them, as well as the way that he is able to mobilise a whole bunch of forces at his command when he goes to rescue Amy in A Good Man Goes To War and proceeds to completely take over the base in seconds. And then of course, there's the biggie: he cheated the fixed destiny that he was supposed to die on a certain date and found a loophole that would allow him to do it. Even D10 wasn't able to avoid his destined foretold death in The End of Time. There's also of course the fact that D11 has become so awesome that the Daleks of all creatures enlist his help despite him being their greatest enemy in Asylum of the Daleks, and his managing to fool Ms Kizlet into a position of freeing all the captured minds in the Bells of St John, and his absolutely badass speech where he's able to hold a SUN GOD at bay before Clara shows up, AND he manages to defeat an alter-ego of himself that is being boosted by Cyberman technology. On the strength of the above, D11 is nothing short of AMAZING, and a supreme bad*ss to boot. Quality of Individual Seasons and Finales Seasons 5 through to 7 did what prior seasons did not and established a core story centring around just how dangerous The Doctor has become and how the Doctor must deal with enemies who no longer just want to rule or destroy the world, but simply want to wipe him from existence, be it because there is a prophecy surrounding an altogether dangerous question about him (just WHO is he (sorry for the pun) and what are the ramifications of his identity?) as referenced in the episodes surrounding The Silence, or simply because his enemies have realised just how dangerous he is (as evidenced in The Pandorica Opens where they build a specialised prison for him). To analyse the individual seasons, Series 5 gives us a truly fantastic fresh start with a new Doctor and new and really well developed companions as well as the beginning of a mystery of the identity of River Song, plus of course the beginning of the plot thread surrounding the "silence will fall" arc and some truly amazing episodes with the Weeping Angels and Vincent Van Gogh in Vincent and the Doctor, not to mention the very well done Silurian episodes. The finale here is suitably epic and sees the Doctor defy the odds and escape from non-existence, as well as helping to further the mystery about who River Song. It was also the first season finale to not massively irritate people, as I'll explain in my R3. Season 6 opens explosively with the apparent murder of the Doctor and properly introduces the terrifying Silence. This starts a truly fantastic chain of events where we have the constant plot thread of Madame Kavarian constantly showing herself to Amy before revealing she has Amy captured, not to mention even further awesome development of River Song and the revelation of exactly who her character is and what her purpose in life was. And again, we get even further depth between D11 and his companions as D11 becomes the first Doctor of the new series to spend more than one season full time with his companions, which is of great benefit to the character interactions on the show. This season finale puts D11 in an alternate time-damaged universe with Churchill and Pyramids where he has to battle the Silence and Madame Kavorian once more and persuade a hysterical River Song to kill him, as well as dealing with the heartwrenching decision of the Doctor to end his life. This is beautifully emotive and feel of really good character development and depth. Season 7's first half revolves around the foreshadowing of Amy and Rory's departure from the show and really goes into great depth about the relationship D11 has with them. After their heartbreaking departure, D11 is broken out of his stupor with a consuming mystery about just who the "Impossible Girl" Clara Oswin Oswald is after The Snowmen. We then see a development of their relationship throughout the episodes while D11 obsesses about just who she could possibly be. As for the season finale, this is visually and story-wise stunning, as D11 is forced to go to his burial site and confront the brilliantly villainous Great Intelligence portrayed wonderfully by Richard E Grant, and produces an awesome payoff to the mysteries of who Clara is (the past Doctor flashbacks were amazing) and what the Doctor's secret is (John Hurt - quite simply wow). Companions will be in R3 due to space.