I just read Steven Moffat said this:

And here’s me, with the job I wanted since I was seven. 40 years to here! If I could go back in time and tell that little boy that one day all this would happen, he’d scream, call for his mum, and I’d be talking to you now from a prison cell in 1969. So probably best not then.

I’m glad his DW scripts have all been this good too.