The England international has been criticised again after kicking out at Cardiff City's Jordon Mutch on the weekend but Moyes says aggression is a standard part of his game and that it should not be altered.
"He is an aggressive player," said the United boss. "It is a big part of his game.
"He plays with his heart, as well as the skills he has got in abundance.
"That is the way he is and that is the way he was when he was a boy at Everton with me.
"That is what a lot of people have said might have been missing from his game last season but it is certainly not missing now. He has the hunger and desire back, he is committed for everything.
"I would rather have a Wayne Rooney that way than any other way.
"Everyone recognises the form he is in. He scored a goal again (at Cardiff) and made another.
"Maybe more attention has been drawn to something else rather than his goal or making another goal but the attention for all this season has been on his good form."
For breaking stories and all the great banter like us on Facebook: facebook.com/tribalfootball