No offense, but why are you complaining that he lowers his head, when there are so many owners out there who can't get theirs to do so? You have what I would consider a 'delightful' problem. He may think he's evading you by putting it so low, so just follow him...no big deal, he will probably raise it on his own eventually once he figures out you aren't going to bribe him. But honestly, anything you do to try and raise his head on your own, may result in a horse who flings his head out of your reach.
As far as his other pushiness, just earn his respect (this will probably fix his 'too low head' problem too); ie, get him to move his feet out of your space, and he will quickly learn that you call the shots, not him. You aren't specific about how pushy he is, or how it comes out, so I can't give you a more detailed answer than that.
"The ideal horseman has the courage of a lion, the patience of a saint, and the hands of a woman..."
Last edited by mom2pride; 10-12-2010 at 12:51 AM.