I always find it hard to answer questions if asked to give a value between 0 and 10 were 0 is bad and 10 is good. I just haven't assigned that many levels of distinction between good and bad in my mind for many things. So upvoting something thrice would be, to me, an unnecessary choice. I feel Exceptional (+2), Good (+1), No value (0) and Bad (-1) would cover my spectrum :)