The 27-year-old actor, who takes over from David Tennant this spring, told Doctor Who Magazine that he hopes to bring a new chemistry to the role.
"My character will be less tolerant than a lot of those who have gone before him," he said.
He added of his assistant Amy Pond, played by Karen Gillan: "And Amy's got real fire in her belly. But there's also great affection and love there, and we're developing that all the time."
> David Tennant: 'I'm jealous of Matt Smith'