Killed? Yes. Liked it? No.
It was like I was possessed up to the point of doing the killing, thinking it was totally the normal thing to do. Then immediately after the feeling was like "NOOOOOO WHAT HAVE I DONE?!"
Then the guilt happens. Oh, to add, the few times it occurred there was no reason why I killed. None whatsoever. I just did it for the sake of it.
Never happened much though, only ever in dreams were I didn't know I was dreaming.