Neil Gaiman on why he cast Michael Sheen as Aziraphale:
"Michael had said he wanted to be in it from the very start. Around 2014ish. We both assumed he'd be Crowley.
Except as I wrote it, I kept thinking of the Michael I know: an incredibly sweet, sensitive, funny man determined to do good and to do the right thing, and I kept thinking of him as my Aziraphale."
“You don't get bored of stories. None of us, as human beings, we just—we never get bored of stories. And I get to tell stories. And each story is new and different, so it's a continuously renewing thing. And hopefully you are constantly getting better at your corner of the storytelling process, and you can—with each new challenge, you sort of have to find a new sort of corner of yourself. And it keeps being difficult, and it keeps being challenging, and it keeps being exciting. And fun as well, if I'm absolutely honest.” — DAVID TENNANT (born April 18, 1971)