McCoy was the biggest deviation from the Edwardian gentleman character of the Doctor and I'll concede Tom Baker was a bit different too, but they still have much, much more in common with the rest of the classic Doctors than with Shagger and Smudger. Not sure how Colin's Doctor wasn't a gentleman. He had a pocket watch and everything.
Matt Smith had a pocket watch and waist coat as well as Colin baker. Besides, Colin Baker tried to kill Peri on his first adventure, and always was a bit rude and oh yeah, he dressed like a clown, do you call that very gentlemanly. If Colin Baker was a gentleman, so was Matt Smith.
The Sixth Doctor was suffering from regeneration trauma when he tried to strangle Peri, and regretted it. From some people's descriptions of the Sixth Doctor, you'd think they'd only watched The Twin Dilemma (I'll save anyone the bother of saying that no one would bother watching anything beyond that because it was so bad by saying it here).
He was very un-gentlemanly like through out his regeneration though. In fact, this is hat Wikipedia said about the sixth doctors personality:
The Sixth Doctor was an unpredictable and somewhat petulant egoist, whose garish, multicoloured attire reflected his volatile personality. He was both portentous and eloquent, even for the Doctor - of whom he saw himself as the finest incarnation yet – and his unpredictability was made even wilder by his mood swings, manic behaviour, bombastic outbursts and glib, unflappable wit. His personality also displayed occasionally fatalistic overtones.
The Sixth Doctor was almost supremely confident in his abilities and did not suffer fools gladly; he sometimes seemed to endure Peri's presence far more than he actually appreciated it, and his superiority complex applied to almost everyone he encountered. His intellect could support his ego; for instance, the Sixth Doctor was the only one who was able to repair and operate the Chameleon Circuit within the TARDIS, allowing it to change shape to suit its surroundings rather than looking constantly like a police box (although the appropriateness of the TARDIS's appearance to its environment was more-or-less nil) in Attack of the Cybermen. However, not only did his melodramatic arrogance and caustic wit eventually subside, it actually hid the fact that this incarnation retained the Doctor's strong moral sense and empathy, as seen in Revelation of the Daleks, in which he showed great compassion for a dying mutant; and The Trial of a Time Lord, where he displayed outrage at his own people for their part in a plot and cover-up which resulted in the death of most of the Earth's population. Underneath his blustering exterior, he was more determined than ever in his universal battles against evil, possessed of a tenacity and a thirst to do what was right that was far more visible than ever before. Despite his often unstable demeanour, he was always ready to act when necessary, and very little – even his companions – could hope to stand in his way.
His condescension towards the universe around him also extended to his companions, especially Peri. While his use of violence against his foes and his abrasive relationship with Peri were both often criticised by fans, the violence was largely in self-defence, and his relationship with Peri had mellowed significantly when the programme returned from hiatus for Season 23's The Trial of a Time Lord.
He was well known for his love of cats, and always wore one of a number of cat-shaped pins or brooches on the lapel of his patchwork coat, itself said to be the height of fashion on a distant planet.[citation needed]
The events surrounding the production of Doctor Who in the mid-1980s caused the Sixth Doctor's tenure to be cut short, and for a long time Colin Baker bore the brunt of the blame as the "unlikeable" Doctor.[citation needed]
The Sixth Doctor's return in the Big Finish Productions audio plays, voiced by Baker, the series have gone some way to move the personality of the Doctor forward thus the Sixth Doctor appearing to be a somewhat calmer, wittier and altogether happier character (attributed in-story to the influence of companion Evelyn Smythe). In a 2001 poll in Doctor Who Magazine, Baker was voted the "greatest Doctor" of the audio plays. Baker has said that he was not given enough time in the 1980s to 'unpeel the layers' of his character.
