I've seen too many Doctors come and go to be more than sad to see one go. I was fortunate enough to live in a PBS college town in the 80's and 90's where The Doctor was a mainstay, particularly at pledge drive time, and when they got the chance they ran all of the available episodes, from "Unearthly Child," through Patrick, Jon and Tom to Peter, and on from there through Sylvester. And now I can go to the public library(or video store) and pick up just about any episode of any Doctor I am in a mood to see. If I really want a new adventure with an old Doctor, the bookstores (and Alien Entertainment) have plenty. My library even has them as e-books. Once one sees a good portrayal of any character, its hard not to see the actor when you read about the character.
No one has any idea what a new Doctor will be like, which makes it scary I guess, but in the end he will always be The Doctor. How many times have popular comics characters like Superman and Batman been re-booted, and while the personality will differ a little, the heart of the character shines through. I am willing to trust an actor who has done an excellent portrayal of the Doctor to know when he thinks its time to move on. And I am willing to trust the people who have helped to make Matt Smith's characterization so good to choose the right replacement.
This picture is great. Without making it too obvious, the bowtie is prominent. And the background does a good job of conjuring the fantasy/fantastic aspect of his travels. I love the hair, and the furrowed brow. It's a tribute to Matt Smith that he looks so right in so many different mediums. While I have seen some great dark images, here your markers make him pop off the page as his personality often does off the screen. And yet the whole thing faintly reminds me of Sci-Fi/Fantasy Art from the 40's and 50's. Good job!