I suspect I'm in a minority here but my take:Harley was such a gifted player. The ball stuck to his feet, could turn so neatly inside and out, always found space, composed, vision, one of those real natural talents who didn't need coaching.
Capable of brilliance, some amazing goals and assists as others have said, but to me he was also much of the time with us frustrating as hell to watch, episodes of magic interspersed with long lackadaisical spells when he appeared to switch off.
Just such a shame that he didn't develop the rest of his game and contribute more to team performances. But lots of players are like that.