Most of my "regrets" were later round picks...
Michael Vick in the 6th - The value was nice at the time, but I had already picked up Matt Ryan. Fortunately, I traded him off for Hakeem Nicks last week, so this ended up working out for me.
My picks in rounds 10-12 I regret a little, just because of the way my team ended up working out...
10th - Jacquizz Rodgers - I like the upside, but I passed on Kevin Smith and Cedric Benson to get him.
11th - Kyle Rudolph - I don't mind having Rudolph, but I think I could have used another RB/WR for a little depth.
12th - Randall Cobb - I passed on Sidney Rice and Malcolm Floyd to grab him, and hearing about James Jones and his lessened usage than I expect, I think I could have used another WR.
Ended up with...
QB - Matt Ryan, Michael Vick (traded later for Nicks)
RB - Mcfadden, Murray, Lynch, Rodgers, Felix, Turbin
WR - Marshall, Harvin, Stevie Johnson, Cobb
TE - Vernon, Rudolph