I think you have a passion and an obsession for something when it's not necessarily ubiquitous.
“I have never described the time I was in Doctor Who as anything except a kind of ecstatic success, but all the rest has been rather a muddle and a disappointment. Compared to Doctor Who, it has been an outrageous failure really - it's so boring.”
“A lot of things happened when I left there, and to be fair they treated me really bad, and now I have to play against them so I don't have any feelings for them at all.”