I'm afraid that most of my Dr. Who is confined to Jon Pertwee, Tom Baker and Colin Baker, then of the new guys Chris Eccleston and David Tennant. Of course, I live in the States so much of the first three was only thru reruns through PBS.

My favorite Doctor without a doubt is Tom Baker, but I did like David Tennant (well, until I recognized that he was Barty Crouch in the Harry Potter Movies.

And I think Eccleston did a stint on Heroes here in the States.