Originally Posted by Pottsie
I think that Dooku wanted to take Palpatine's place as Dark Lord of the Sith. He was going to use Obi-Wan to help him kill him, then Dooku would kill Obi-Wan. It was the same with Vader. Vader tried to get Luke to join him and overthrow Palpatine, then probably take over the Galaxy for himself.
Who'd want an apprentice, eh? Because at the end of the day...they always plan to kill you...same old, same old!