For me Wimbledon definetely is the highlight. I know the whole journey to the final was a bit ho hum, but the final made up for it in a big way. That was where not only his tennis on display, but also his inner strength.
For him to defend his most loved slam when he's not playing his best against a fired up opponent is just magical
EDIT: Furthermore, I think this is the deciding point on Rogi and Andy's year to determine who will have the momentum for the top position.