David is a machine at scoring trys, as far as finishers go he is the best at scoring in the corner, there is no one better.
Unfortunately he had some kind of mental health break down at the Warriors, the club were fiercely protective of him, so the story of what happened never came out.
If it relates to his game it is not hard to see why he became a depressed looking player out there. The Warriors got rid of Shaun Johnson, and moved Pita Hiku to the opposite side of the field, any good ball that David had been getting to lead the comp in Trys completely dried up...he became a battering ram for kick returns and you could really see him suffering out there in a slump.
I am really happy he has made a decision to have a clean break from the NRL. The Warriors looked after him for most of this season and did not give up on him, clearly they value the guy as a person.
He is a winger, a great winger.
He can fill in at Centre no problem, but he is not a specialist there, he did not set the world on fire, merely provided a really solid injury cover at Centre for the Warriors.
His junior football was played a fullback.
He has a loping style as you will see in those videos, not the fastest winger around, but if your back line can line him up with the corner post you would put the house of David beating the defender and scoring.