In my opinion it is (surprise surprise) again all in the matter in communication. Some subs might push back just to test their Dom/me patience, others might do it knowing full well and expecting to be punished, while some just aren't subs, but have this subby feeling poking behind there. If Dom/me and sub sort it out and get to the core of the matter, it should be fairly easy to work with a sub bit on rebelious side. Personally, i wouldn't mind a sub who would be a bit on spunky side, kinda like light version of sub chaotic. As long as she wouldn't blatantly disobey my orders, i might actually enjoy it. Also, one of those always kneeling "yes mistress' subs...I'm not sure if they would be for me.