Thanks for the replies. Figured it was a Copperhead, but wasn't sure. Didn't take the time to pry its mouth open and see - was late for a card game at a buddies cabin.. After looking at some pics on line at Rat Snakes, the skin patterning can be similar, but the head shape especially gives it away. My only concern around here is the rattlers. Certain rocky areas seem to hold quite a few of them in the summer, and I have almost stepped or sat on one before, and they don't always rattle to let you know they are there..
I don't usually kill a snake unless it's poisonous, and around the house, or where the dog can get into trouble with it. In the woods, no harm done. Raised a Python and a Boa in the past, so they don't really bother me, but yea, like Scibaer said, the instinctual fear of things like snakes is in the human gene, as a survival mechanism.
Larry