I dont know if you can already do this, if so can someone inform me where to. But, I think it would be nice to be able to write a little commment on why you gave someone positive or negative karma. Just so the only person who can view it is the person who left the comment. Like if I think someone was really helpful and gave them +10, I want to be able to put a little tag on it so if I click on their name again I can see that they helped me. Which works in the opposite, if I gave someone bad karma, why I did. Like if they were jacking threads or if they were a bad person to buy or sell with.
Just want a little reminder for myself on who did what, that only I can see when I click their name.