Charisma / Charm
Okay, I admit you've got a point, and you probably know us all better than we think lol
Personally, I'd only looked at it from the positive aspect, and not considered the negative aspect!
I would be really gutted if I got a 'minus', so would want to know pretty rapidly, but would also hope that people are being fair when they leave a negative charm for you.
It certainly makes you think about it when you put it like that JB!