Re: John Simm wants to be the Master again
I really like John Simm's Master, but he was really Tennant's Master, I'd just as soon see a new Master for Matt Smith's Doctor.
See, I like having a continuity of Masters between the Doctors. It emphasizes his role as a separate character who can also get recast rather than just a mirror of the Doctor. Of course, he can be a mirror too, but I wouldn't mind at least one episode overlap.
When on Romulus, Do as the Romulans