I can tell you one color I rarely see in my area......the brown color. I think on a King Ranch or FX4 it would look sharp as all get out. It was probably my first color choice, not that I hate the Candy Red FX4 I ended up finding, but there is something about that Brown in the King Ranch that just does it for me. I wouldn't want it in a XL/XLT/Lariat, but any of the other 4 packages I would take it in a heartbeat. Seems really hard to find unless ordered. I searched everywhere for a gently used one and even brand new one, but could not find one.
I see a lot of silver, grey and flame blue, followed by candy red and black. Not so much red, white and especially not bronze. I have dark blue pearl two tone (with silver) and don't see many like that. Regional of course.
In my area white, black, and silver/grey are most popular colors, with white two-tone the most popular. Rare colors in my area would be Royal Red, the greenish-brown color offered in 09 (still never seen one in person), the brown color they introduced in 2011, and Flame Blue. The 2012s are offering a metallic green color apparently which might turn out rare since they didn't offer green in 09-11 MYs
2010 Lariat Screw 4x4 - "little crazy, little sweet ain't nothing that can beat a little lady in a jacked up Ford" - "Girl in a Truck" Kevin Fowler