Originally posted by Gideon
Because Starkiller attempted to kill him? Unlike Vader, who did the smart thing and kept his mouth shut (even though he felt the same way).
About this - I was under the impression that relations between the Emperor and Vader didn't really sour until Galen defeated Vader and Palpatine urged Marek to kill him.
I know in ROTS he's entertaining the thought. But RODV doesn't give off that vibe. Then TFU happens and Vader still shows no hostility towards Palpatine. After that, he takes another apprentice (Tao) with the exact intent to kill Palpatine, and entertains similar thoughts once he learns about Luke.
By ROTJ, he's broken again ('til the very end).
To what degree of incorrectness are my observations?