Nine is also my favorite. I was not a fan of the old Doctor Who. I found Four and Five tolerable, sometimes, and occasionally enjoyable but I suffered through the old Who because classic Degrassi came on right after on our local PBS (shallow tween that I was). I liked the Doctors and some of the plots but the terrible special effects were too much for me. My mom and brother were huge fans. They have both been reluctant to watch new Who but I know my brother finally took the plunge and loved it. I have a better appreciation of old Doctor Who now, and I do enjoy watching them from time to time. In some ways Tom Baker is also the doctor I always think about first.
However, Eccleston brought such tremendous energy/terror/madness/fun to the role that he really, really rejuvenated all the good in past doctors and put his own stamp on it in such a way that I still miss him more than I miss Tennant or Smith. His interaction with his companion and her family, his suspicion of Jack, his dark side and light side were all magnificently done. I think the very first New Who I saw was a Tennant episode but it was interesting enough to check it out and discover that Nine really was fantastic.