Everyone has their own "favorite" GM. Of the currently employed bunch, mine is Ned "Snakeskin Boots" Colletti. And he is awesome -- Juan Pierre, Nomar, keeping LaRoche et. al. on the bench, and so much more.
But he's only my #1 because one very special little boy sadly lost his position this year, and that little boy is finally in a front office again. Look out, Omar! Indeed, look out NL East!
[Note to Dayton: if you think Burgos-for-Bannister was good getting...]