The Doctor;

The Doctor — Alias: Ten — Age: 903 Earth Years — FC: David Tennant
Doctor: n/a — Species: Time Lord — Open

+ Tenth Incarnation of the Doctor
+ Has traveled with Martha Jones and has recently been reunited with her and is currently travelling with Martha and Donna Noble.
+ Much more outgoing than his previous incarnation
- Haunted by his feelings for and the loss of Rose and they are aroused when she and his Ninth incarnation appear in the Tardis even though she has not experienced their travels yet. 

The Tenth Doctor was the tenth incarnation of the renegade Time Lord known as the Doctor. Unlike his immediate predecessor, who was plagued by melancholy due to his actions during the Last Great Time War, this incarnation was much more outgoing and genial, a demeanour that hid the “survivor’s guilt” that had plagued him since the war. Over his life, however, the weight became much more pronounced. He was haunted by companions lost, enemies believed long-dead and events that threatened the fabric of time itself. He met his end after he absorbed a huge quantity of nuclear radiation whilst saving the life of his friend, Wilfred Mott, leading to his regeneration into his next incarnation.