“That was a jolly little side effect.” The Master is not one given to whining or feeling sorry for himself. He moves on. There’s always something else. Something to do. Fun to have. In that respect he's very like the Doctor. It's not for nothing they were once close friends. However, his intention to build a new Gallifrey had been heart's-felt. Despite the insanity.

He's the Master. And not entirely in possession of all his faculties. He doesn't back down to a pint-sized ..whatever she is. “Ooh! Scary. What are you going to do? Chinese burn?”