Yeah, that's kind of my point - it's really a case by case basis. Sometimes you have an actor and a story that can support and accent, and sometimes you don't.

I figure Ten just wasn't Scottish because the Doctor has never been Scottish... though Nine was "from the North" so I don't see why they couldn't have gone a little bit MORE North...but whatever, I don't work for the BBC. I happen to love David's accent though, and I'm sorry I only get to hear it in interviews.