Seventh Doctor

Regeneration - Post-Regeneration
It has been suggested (mostly through journeys through the Doctor's psyche) that his seventh self forced a regeneration in his sixth persona because he was too out of control, and was heading down the road to become the Valeyard. (NA: Timewyrm: Revelation)

Thus when the TARDIS was attacked by the Rani, the Doctor deliberately hit his head on the console triggering a regeneration, allowing his seventh persona to come into being.

Following his regeneration he had a slightly comic personality, due mostly to post regenerative trauma.

Ace and Facing Fears
When the Doctor and Mel arrived on the planet Svartos the Doctor encountered Ace, a much more brash human and recognised something in her that would assist him in the future as Time's Champion. He used a mild form of hypnosis to persuade his current companion Melanie Bush into leaving him. (NA: Damaged Goods)

The Doctor lead Ace to through many challenges, leading her to face her fears, with the intent that she might take his place in the future.

Time's Champion
The Doctor became the eternal Time's champion, assisting the universe and Time in the more complicated and hard of historical challenges. One such challenge involving the Hoothi was seen by Ace as an ultimate betrayal, leading her to leave his company during events on the planet Heaven, it also lead Bernice Summerfield to join him.

Characteristics
The Seventh Doctor was a darker character, manipulative and frequently saw the 'bigger picture' rather than the world before him.

Personality
to be added

Habits and Quirks
The Seventh Doctor played a lot of chess, and not just on a chess board. He used it to battle his enemies and also to move his companions and his adventures around in the universe. (DW: The Curse of Fenric)

Mysteries and Discrepancies
to be added

Key Life Events

 * Hand of Omega 'given' to the Imperial Daleks in order to 'trick' Davros into destroying Skaro. (DW: Remembrance of the Daleks)
 * Discovery of the Master's condition on the Cheetah Planet, and subsequent fight. (DW: Survival'')
 * Battling the Hoothi, Ace's leaving him, meeting of Professor Bernice Summerfield. (NA: Love and War)
 * Loss of his TARDIS, gaining of alternate universe TARDIS. (NA: Blood Heat)
 * Encounter against Mortimus. (NA: No Future)
 * Ace's real departure, her becoming 'Time's Vigilante' watching over Earth for him. (NA: Set Piece)
 * Becoming human. (NA: Human Nature)
 * Return to his home on Gallifrey. (NA: Lungbarrow)