I feel like now is a good time to get involved in this.
I became a fan of Doctor Who sometime in September. My first Doctor was actually Eccleston in the episode "Dalek" (which is still one of my favorites), but after that I ended up watching a lot of Tennant's because, well, he was on television. And Tennant is my Doctor, essentially. I find him to be a great actor.
Favorite episodes:
S1: "The Empty Child/The Doctor Dances"-Steven Moffat, great story, and I love things set during WW2. "Dalek" is a close second because it was a good example of a companion making the Doctor better.
S2: "The Girl in the Fireplace" or "Doomsday". Both good stories, and the second made for a great season finale.
S3: "Human Nature/The Family of Blood" for a great story and great acting, as well as "Blink". And I loved the Master. John Simm is excellent.
S4: "Silence in the Library/Forest of the Dead". (I sense a trend here.) Although I liked the rest of this season as well. And now, to add comments on the specials:
I liked "Waters of Mars" because it challenged the Doctor to not do anything. Of course, he didn't listen. The good thing is that when he didn't follow the laws of time, he got put in his place.
"The End of Time, Part 1" was epic in the sense that the plot was rather wild and hard to follow, and it involved the return of the Time Lords. I didn't really like it as a whole, but the part with the Doctor and Wilf in the cafe was my favorite. I've always liked the theme that the Doctor's companions make him better, and it is at this point where the Doctor admits that to Wilf.
"The End of Time, Part 2" was excellent, especially in terms of acting. Very much better than Part 1. The goodbyes at the end were a bit long, but I have to say, I rather liked his last visit to Rose. Just because it had the feeling of going full circle and all that. As for his speech to Wilf, I found that really interesting. It's a side of the Doctor that people don't like to acknowledge, but it exists. I can understand why he would say such things--it must be stressful, thinking you've cheated death only to find out that you are in fact going to die, just not in nearly as justifying circumstances as you thought. The best part about that scene, though, is the fact that the Doctor still saves Wilf, just because he's still the sort of person who would. He can overcome the darkness. I also liked his comment "Live too long". I wonder if we'll see any of that sort of view (about living too long) in the next Doctor.
Speaking of Matt Smith...I loved his entrance! My sister hated it. It was actually really jarring, to have Tennant's Doctor fearing death and then, next second, to have Matt Smith's Doctor frantically yelling and running around. But I thought it was brilliant. A great set up for next season.
*sigh* I'm done.
"I'm sort of like a child genius without being a child or a genius."~Tim Rice-Oxley