I am Going straight to Hell.
Here...don't forget your handbasket.
Just kidding. I got one personality vampire co-worker to shut the f- up about her daily dramas by onetime getting a word in edgewise about old 'friends' I'd cut from my life. She asked why and I told her. She was smart enough to realize that their actions sounded a lot like hers.
'Am I a personality vampire?' she asked.
'No, but you're on the edge of being a blood-sucker.'
She shut up and never spoke to me again.
Ah, sweet silence...