Michael C. Hall has got to be the nicest serial killer of all time!
Not only does he only go after bad guys, but he'll also take a minute to sign a fan's knife! He doesn't even look terrified!
Ch-ch-check out the pics (below) to see seksi star take time out for the weapon-wielding Dexter fans!
And see Michael charm the pants off of Jimmy Kimmel - and give us a Dexter sneak peek - …AFTER THE JUMP!!!
[Image via Mavrix Online.]