this is good, gets our mind grapes juicing.1) Is it just running over, pecking / flogging then running to a safe distance to deny your counter attack and simply watching you?
Bird has associated such behavior with a reward. What does he get out of it, especially with respect to nutrition?
2) Is he standing his ground and flaring his hackles and interspersing this with outright attacks with spurs, wings and bill?
He is outright fighting you for rank and treats you as a conspecific. Based on most discussions this the assumed by keepers of man-fighters. Something is or has gone on that got him into mindset that you need to be and can be defeated so as to be a subordinate.
3) Is he attacking while fluffed up like a hen making lots of noises and moving about in a very fussy manner?
He treating you a threat and is trying to repel you. More details need here from party with such a bird as can have many causes.
Note: I did not as of yet provide actual methods for promoting changes in behavior for a given situation.