Defining a "GREAT" horse

In your opinion what makes a horse great? Does the horse need to win multiple Grade I's? Does the horse need to beat older horses? If a female, does she need to beat males? It seems that us board members determine the critera for greatness based on who the horse is. For example, people will not call Bernardini GREAT because he hasnt faced older horses. Why does he need to face and beat older horses? Lets look at Funny Cide, he has multiple Grade I wins and has beaten older horses. He has won three of the most prestigious races out there. Do we consider him GREAT!!!! If Bernardini had that resume he would be deemed GREAT by some board members. Smarty Jones never beat older horses and only lost 1 race. Is he GREAT!!! If YES then why and if NO then why. Basically lets determine what makes a horse great. Please, lets not argue and just set some criteria as to what makes a horse GREAT.