First off Nine is my Doctor. I don't ever get why people skip over Nine. As far as the new series goes it would be like reading a book and skipping over the first 7 chapters. Not only is Christopher Ecceleston a bamf, and phenomenal actor, but he sets the entire series up for you. I also find him very attractive.
Next is Ten. I think David Tennant was great(And of course with him came one of my favourite companions Donna Noble). Unlike Nine he had more of a quirkynes to him. Bad ass and adorable. What's not like.
Then we get to Eleven. Oh Eleven. I don't know if this makes sense but I like how Matt Smith plays Eleven. Out of all the recent Doctors he is probably the one who is most all over the place. Which I think he plays well and it works for him. My problem with Eleven is everything else. Matt Created a great character, but out of all the new series he's story lines were the weakest, and plot and character development were spotty at best. These and a combo of other things made Matt my least favourite Doctor.
And for the record I don't blame Matt. My pretty, painted finger of judgement is pointed squarely at Steven Moffat the show's showrunner. He also seems to think bigger is better. I liked Doctor Who when the sets weren't the best! My point is I personally don't like the direction he took the show. With a few exceptions the episodes he has been the showrunner for have been the weakest IMO as a whole with a few exceptions(Vincent and The Doctor).
Now when Matt leaves I want to say I would love a female Doctor, I would love to say I want a companion who doesn't have a twinge of romantic feelings for the Doctor a la Donna Noble, I would love to say I hope they get a brilliant actor/actress with an amazing range to replace him that brings something new to the table. The thing is I fear that under Moffat's reign he would manage to jack up those scenarios. Especially the female doctor. If that's going to happen someone else needs to be the showrunner. That being said I would not mind if he wrote episodes every now and then. The Empty Child, The Girl in the Fireplace and Blink are some of my favourite episodes!
*All opinions are mine. Feel free to disagree.