what was your favorite episode of david tennant as doctor who?

'The Stolen Earth', as the Doctor and Rose's reunion was sooooooooooo emotive!

I would say Blink because I LOVED that episode, but he wasn't in it much so I would go with doomsday-he had AMAZING acting in it and it was soooo sad!

Very few to choose from actually. The writing was rather bad during his tenure. The best stories in the Doctor Who canon belong to the Tom Baker era. I guess I would go with "Blink". Although it still wouldn't be in my top 30 Who stories.