New Earth
Looking at the early UK newspaper reviews, this hasnt been received too well...I loved it personally. Yes it was silly but what's wrong with that? It made the contrast with the sad ending to the episode so much better....
One review said that Billie Pipers cleavage would only get her so far....well, suffice to say it didnt bother me too much...It would have been nice to have a bit more Zoe Wanamaker..maybe had her voice over the Doctor's and Rose's and a trick was perhaps missed by not showing Cassandra/Rose's point of view when she changed.
As for the new Doctor, I enjoyed him immensley. David Tennant can obviously do the funny stuff but he showed that he has that steel needed for the role as well. This certainly shows with the Cat Nun scene.
I think the backlash to the hit first series has started now but not every episode is going to be emotional and upsetting a la Fathers Day or The Parting of The Ways. I think you have to have funny and sad, crying or glad as contrasts or you dont believe each of them when they come around.
You could definitely see it was a Russell T Davies script for exactly those contrasts. He walks that line of happy and sad more than any other writer on the show. Before the Anti-RTD crusade starts...just jump in the TARDIS and imagine when he leaves the show. Think about who might take his 'Dalek Emperor' role....the care and attention he brings to the show, the care and attention that he brings out in others....those will be big shoes to fill...
I think most importantly the kids will love New Earth and I'm actually going to agree with my missus for once...that Doctor Who is a kids show...as someone said the kids show that adults all adore...