The hardest thing to learn is to flexibility.

If both people know how to accomplish something but go about it in different ways, then they will probably consider the other person ignorant and need training. I\\'m not talking about the clueless moron that doesn\\'t use his abilities properly, stands in the fire, and sticks to the actions that do dmg but no hate. Those people need more help than just training. But I digress.

I\\'m talking about things like where to tank the boss, mob kill order, which mobs get slept, how to handle adds, etc. Sometimes, BOTH ways would actually work, but if neither party is willing to adjust then they may attempt an encounter using both methods with often catastrophic results. Then they each blame the other party and call each other n00bs on the forums.

The hardest part is figuring out what to do with what is handed to you. Sometimes the only way to learn is to make a lot of mistakes first. Not a lot of players have the patience for that.