I'm going to be a lich.
I get the keep my mind and memories, so I'm not some dumb zombie going babbling "brrrrlll" here and there, seeking brains. I'm fairly powerful so I can pull out my own weight, enough to become the necromancer's right arm. And if it comes to the worst I can always backstab the necromancer and become the boss, as typically lichs have their own necromancy.