In our family the definitions always were that "stuffing" was dryer & more "fluffy", while dressing was moister & more solid. Since dad liked stuffing & mom prefered dressing, they used to take turns every year.
Since these days Thanksgiving is just husband & I, & he's not a big stuffing/dressing fan, we roast our organic free-range bird without it & I try whatever stuffing recipe tempts my fancy every year baked in a separate casserole. Since we have a very proliferous chestnut tree on the farm, some years I use my own chestnuts for a chestnut/brandy stuffing; other years I do a cornbread variation; still others I take the easy way out with just a bag of commercial cubes with a lot of home additions. It always comes out great.
I must say though, that the one stuffing I definitely did not care for was oyster stuffing. I just couldn't warm up to the seafood/turkey thing.