I'm calling it...he's gonna be huge!
I've recently started watching Doctor Who only because I caught some previews on BBC America. Anyway I saw it and loved it, and now I've been streaming the seasons with him in it (I'm now on season 6) on Netflix. I'm pretty much hooked lol. I've watched a few episodes with the other doctors (I watched a few episodes from the the 9th and 10th doctor as well...my fave companion is Martha even though I see that she wasn't that popular).
In terms of the 11th doctor, I know the show is gaining popularity in the US...but I just thought I would call it and say this guy is gonna get huge here. Alot of my friends already know who he is. He's such a great actor and can convey so much emotion with the smallest of gestures.