John Barrowman, Captain Jack Harkness himself, gets interviewed over at Off The Telly and comes across as charming and honest. Just as you'd probably expect:
JOHN BARROWMAN: I'd play Jack for the next 10 years if you asked me to.
OTT: You're always going to be identified with him, aren't you?
JOHN BARROWMAN: Of course I am. And that's not a bad thing. You know, to be driving my car and to have my window down on a nice day and kids at a bus stop go, "Look, it's Capt Jack!"