DTH does like Doctor Who now, but only the Matt Smith era, so he can keep his nickname. (How can anyone hate David Tennant?) I have no idea why he's suddendly captured by the Math Smith, but not David Tennant. He's not a head over-heals fan like me...yet, and he claims that he never will be. 

I think part of it is that he seems to be very interested in Amy and her whole history or something. 

The good news is that I don't have to tutor him in math to watch a new episode (grrr, he's a horrible student)

My dad's in the same boat but he does recognise David as the better Doctor (yay!); his favorite companion is River though. 

Now, I just have to convince my mom...