Every Doctor is "my" Doctor. There's never been a Doctor I haven't liked. Each played to the individual actor's strengths, and each era had its own distinct feel. So it's been 10 times now, so it will be with #11.
I don't fall into the "favorite Doctor is your first" category. My first Doctor was Tom Baker, but my favorite is Pertwee, with David Tennant only a hair behind Pertwee. He'll finally surpass Pertwee if the final three specials play out the way I think they will. And then the fun begins as I wait to see if Matt Smith can start moving up the ranks.
Alex