Predicting the Pirates pick is always a challenge because of the unknown of their board and the way the board develops. But looking at history of old drafts can help give a base line look into their draft philosophies.
Round 1:
Neal Huntington has had 13 first round picks as is his time as the Pittsburgh Pirates General Manager. His first pick, coming in 2008, was the top college bat in the draft and a Scott Boras agent player, in Pedro Alvarez. That set the table of showing that they have no fear in going aggressive, which can be seen with Gerrit Cole in 2011 and Mark Appel in 2012, and also Josh Bell, a round two pick in 2011.