Christopher Eccleston, definitely. But I think that they're all really good, anyway.
My favorites are Christopher Eccleston and David Tennant. :)
Matt Smith is and will always be my favourite, but I really like Eccleston and Tom Baker. Tennant is pretty cool too, I suppose.
They're all so wonderful. In order to be sure, I would have to re-watch the past six seasons; however I think "my Doctor" would be the ninth Doctor, Christoper Eccleston. His season was at a real disadvantage technology and funding wise, but I really connected with that personality.
On a side note, my favorite companions have been Rose, Donna, and Rory. What about everyone else?
Tom Baker 8)
I think that each Doctor has his own level of awesome, it would be a crime to compare them.
I've only seen a few episodes of the classic series so I can't really say about them, but from the new series, has to be David Tennant. Particuarlly for the series, when it got to the year of specials, well let's just say I didn't like them at all :/
And with companions, I would have to say Rory :)
The Doctor is the Doctor and I love all of him. :D
(Having said that I really love Eccleston, Tennant, and McCoy. Haven't seen much of the others yet though.)
David for sure. I started watch Doctor Who when he was the doctor. He will always be my Doctor. I like Matt but he's no David.
I like Davit Tennant the most because he's happier than Christopher Eccleston but also less "Hollywood-y" than Matt Smith.
Sorry, someone had to say it. :B