We had a thread about this a few months ago. And from my experience, your avatar does influence other players. If I flop the nut flush, I allways still look in my cards. When I have the nuts and push allin, I sometimes check my cards a couple of times so the other player gets to think I am counting my outs. I dont really read opponents by their avatar, but I do use mine to confuse them.

You can read the old thread about the avatars here: http://www.pkrnation.com/general-pok...35-avatar.html (Avatar)