My guess is that a lot of people here are going to choose Eric Berry. He is, no doubt, a dynamic player and Skins fans haven't seen that at the Free Safety position since Sean Taylor. It's been a long six years.
Berry was slowed early in his career by a torn ACL. He has fully recovered from that and is developing into the player the Chiefs hoped they were getting when they drafted him with the 5th pick in the 2010 draft.
Surely some people here will even suggest Andy Reid.