I can exclusively reveal, to you good people of The Escapist that I am the next Doctor and I will be the most realistic Doctor ever. I have already had the scripts sent to me (yes, we are that far ahead), I'll give you a sample.
Clara: "Doctor, Daleks are attacking London!"
Doctor: "This again?"
Clara: "We have to do something."
Doctor: "Meh...I mean...my thats unfortunate...but...fixed point in time. Say, Clara, I never did thank you properly for saving me. Join me in the bedroom."
This of course is a late night special that children should not watch. Then, when my time as The Doctor comes to an end, The Doctor dies as he is out of regenerations. Obviously all the Doctors friends are incredibly upset. Cut to a month down the line, Clara finds out she is pregnant with The Doctors child. The child grows up to become the next Doctor.
And thats how they solve the problem of the limited regenerations.
On topic, I am sad to see Matt Smith bow out as The Doctor, I liked him a lot more than David Tennant. Mind you, I liked Christopher Ecclestone more than Tennant.