I love LeBron and always have, and know that this is a sin, but I can't help myself, being only human.
He's just an incredible player. I don't think it's even possible that he calls all the plays since the coaches do alot of that. If he's playing hero ball, it's because someone told him to.
So he chokes sometimes. He is so young with such a load on his shoulders. He'll improve on that once he finds the right team and coaches.