Its always quite clearly been that, most of the time he went missing when we really needed him (end of 09/10 springs to mind), and once he went on a bad run of form it was almost impossible to get him out of it. He is a HUGE confidence player, and at a club like United you can't let it affect you the way it affects him which is why he isn't a starter for us, or on the bench any more.
You can see his talent when he gets the ball, or against smaller teams but very rarely he put in the effort to get into open space or to drag defenders out of position, which is a huge part of football as it creates openings for others. Having a brilliant touch and great technique on the ball alone isn't enough to be a big success at a club like ours, where we have other very talented players, maybe not as talented but who bust a gut to close down defenders or to get in better positions.