Got till the end of the 1st season. After the first 3 episodes the fun lets up, and changes into something different... Not sure how to describe, but what from what I see in every episode it's a character falling for Rose, or the Doctor. And I mean always. It gets a bit boring. Not to say, the characters always feel, that no matter their emotion they can never get between Rose and the Doctor.
The one with the II. WW, the gasmasks and the "Are you my mummy?", that was freaky!
The Captain... I understand why he was needed, but now I'm really curious what was with his 2 years.
And for last, the Exterminate guys. The first, lonely one made me remember that depressed robot from The Hitchhiker's Guide to the Galaxy? Or was it an animation with the suicide robot? Don't remember. Anyway. The invasion full with Dalek's, made from humans, stript of every emotion, that was so cool! I loved the end. At last till the change. T_T
As for the actor change... I don't like it. While the first guy was not handsome, he looked charming when smiling. The other.... that googly eyed, like taken from an emo vampire story, it really makes me want to cry.