Success, however you judge what that even means, brings with it certain pressures.

You never undertake a project because you think other people will like it - because that way lies madness - but rather because you believe in it.

I used to be mouthy. It was all to do with being a northerner and from Manchester, which was suddenly a big deal when I was in my 20s. When I read some of the interviews I did back then, I cringe.

I'm good at being on my own. As a kid, I was always in my room alone, so I have a high threshold for it. If I'm bored, I'll read. Hanging around doesn't go well with me.

Twitter has restored my faith in humanity. I thought I'd hate it, but while there are lots of knobheads, there are even more lovely people. It delights me how witty and friendly most people are.

I'm incredibly proud of 'Life On Mars' and 'Doctor Who.' They're just a blast to do.

Success, however you judge what that even means, brings with it certain pressures.