User blog comment:Sifter66/Who do you find is the most Easiest and Hardest Champion to Play?/@comment-4131177-20130223001444/@comment-216.36.26.248-20130223100416

I believe "characters with which you feel you are more or less effective based on your experiences". I'd assume any character people name they would have played a few times and either rocked the house out the gate or got utterly crushed without being able to piece together why. Doesn't necessarily mean win/loss, you can be doing extremely well and still lose as a team.