I actually don't mind that the Master is back, because the Master is one of the Doctor's permanent villains, even if the end of the last story arc where he died was absolutely perfect and incredibly emotional.
I am annoyed that now she's just another one of Moffat's spunky sexualized female villains.
And I'm starting to just learn to put up with the oversaturation of Cybermen and Daleks in the new series, because it's clear we're not going to get a reasonable amount of them in story-friendly doses until someone else takes over.