The Doctor & Dalek
"Run!" In TV's greatest (re)introduction, The Doctor returned with a bang, and though his 9th incarnation lasted only one series he managed to leave his fantastic mark on an old and a new generation of fans. He came from nowhere, dressed in a battered leather jacket and carrying the scars of a war beyond human comprehension. A Time War, waged against the merciless Daleks. This Doctor was a man who had seen unimaginable horrors; a man who had watched/caused the destruction of his species and his planet. He was alone, he was angry, he had a Northern accent ("lots of planets have a North!") and he strode through the Universe like an unstoppable force. Because he was one, and he knew it.
Christopher Ecclestone's Doctor is one of the best portrayals there is, partly because he had the hard task of bringing the character to a new and sceptical generation, and partly because he had to play a whole new Doctor; a man who loved Humanity but who had been so irreparably damaged by war that he saw the universe through jaundiced eyes. It's a complex, brilliant performance and one underrated by many. He revels in the little cliches of Humanity but is easily aggravated by them. Ultimately though, you know he is the Doctor, because he's willing to give up everything, even his own life, whether for the entire Earth and just one girl.