Think the Golden Ball should belong to a player from one of the two finalists. Messi wasn't Argentina's best overall player - Mascherano was imo.
Butttt.... Like everyone said it's hard to pick a standout individual from the German side... I think Muller is the most consistent, albeit tightly contested between him, Lahm, Hummels, Neuer and Khedira in the *overall* tournament.
That being said - my vote goes to our Wembley hero; no one expect the Dutch team to go this far, his goals against Spain were beauties, and iirc he was the most fouled player in the tournament. He carried this relatively young and inexperienced (or aging depending whom you ask) squad and was a constant inspiration for the team. RvP played great in some matches, but we know who the star of the team was... And who was the real "captain"
The "admission to diving" marred his otherwise wonderful performances in the WC.
James was amazing too, considering that he wins the Golden Boot even though he got eliminated in the QF.
Basically, anyone but Messi