Multiple personality because you wouldn't know what was going on and alot of people think that you have a made up disorder that your therapist caused. You wouldn't be able to know what personality said what or did.
Turrets would be the easiest becuase most people now adays just think you are a normal person just acting weird. More people accept others with turrests more than alot of disorders and they don't look down on people with it and cast them out.