I pretty much like all of them - including the crappy FOX movie Doctor - he was a good doctor just in a bad movie.
My Favorite is Tom Baker, he had a good dramatic range for the Doctor.
William Heartnell was a great Doctor, great choice to start the series with.
Patrick Troughton and Jon Pertwee, were great Doctors but the episodes dragged out way to long, at least with Pertwee they writers tightened up the episodes.
Peter Davidson set the standard for the series after Tom.
I think Collin Baker got hard criticism as the Docotor , he had to follow Tom and Peter, and did a damn good job of it as far as I'm concerned, and he had some good and imaginative writers, especially with trial of a Time Lord.
I don't know much about Sylvester McCoy only saw a few episodes with ace, and the quality of the episodes decreased but what I saw was pretty good.
Christopher Eccleston was a kick ass Doctor - pissed me off that he had to be all artsy fartsy and only do one season, he should have done at least two seasons. for that he's on my shit list.
David Tennant, I liked his Doctor allot - he would be my second favorite Doctor if the stories didn't get so mushy and emotional.
but none the less I would have liked to seen more of him as the Doctor, he left to soon, would have liked to seen him up against Timothy Dalton's Rassilon.
Mat Smith looks good, but not looking forward to him up against the Master or Rassilon.
to much Daleks - I like them but enough's enough, the new Cybermen - iiih , OK but I like the old ones better.