Great question. For me, James Rodriguez was pretty impressive, as were a number of the goalies (Ochoa, Tim Howard, Manuel Neuer). In fact, Chris Jones at ESPN makes a pretty good case for Neuer being the best player of the tournament: http://www.espnfc.com/blog/world-cup-central/59/post/1947095/manuel-neuer-just-might-be-the-world-cups-best-player
Definitely worth a read. And Pirlo is one of my favorite players, so I’ll follow you just for having such a great icon!