I would like to point out David Tennat was in the role from 2005-2010 a period of 5 years (4 full years), Matt Smith if he does leave around 2014 would have been 4 years in the role.
Given the shows history the average span of a particular actor playing the role is 3-4 years. So it looks like Smith is on course to do the average length of an actor in the role. So out of the actors to portray the docotr since it came back, only 1 so far portrayed the character for aa shorter period than the average which was Ecceleston.
To those of us growing up with DW, it's part of the show and somewhat expected. A counter argument could be made that if they did stay on longer they overstay their welcome.
And you can't force someone to stay in a role longer than they want, doesn't matter how popular they are, if the actor leaves what are you going to do?
Given the shows history the average span of a particular actor playing the role is 3-4 years. So it looks like Smith is on course to do the average length of an actor in the role. So out of the actors to portray the docotr since it came back, only 1 so far portrayed the character for aa shorter period than the average which was Ecceleston.
To those of us growing up with DW, it's part of the show and somewhat expected. A counter argument could be made that if they did stay on longer they overstay their welcome.
And you can't force someone to stay in a role longer than they want, doesn't matter how popular they are, if the actor leaves what are you going to do?