David Tennant left Doctor Who because he wanted to do other things professionally, like play other roles, do more theatre, and because doing Doctor Who is a very tough workload and meant he couldn't spend time with his family and loved ones. He also suffered major injuries during Doctor Who because of all the stunt work he had to do which may have been a factor.
Because he felt it was time to move on, during his announcement he said; "If I don't take a deep breath and move on now I never will, and you'll be wheeling me out of the Tardis in my bath chair".
On the national television awards he said that it was his dream job and if he didnt leave now he never would
It might have been due to his Lumbar Spondylosis.
His Reason for Leaving is Unknown
No, he is the tenth doctor in the series of doctor who.
Matt Smith will be playing the New Doctor after David Tennant.
No.
No David left the show over a year ago.
he wears a brown coat and trousers
David Tennant is The 10th Doctor in Doctor Who.
David Tennant played the Doctor from 2005 to 2010.
No, he is the tenth doctor in the series of doctor who.
David Tennant is famous for acting in Doctor Who
Yes!
matt smith
David Tennant will be replaced by Matt SmithMatt Smith is the new Doctor Who.
Matt Smith will be playing the New Doctor after David Tennant.
David has been The Doctor for three series; two, three and four.
The West Wing, and Doctor Who.
Zygons, I think?
No.