Wolflady-
I have some herbs growing in a windowbox in my kitchen, and my favorite is basil. It likes a lot of water, but otherwise it's really low-maintenance. It's also really pretty and smells divine. Basil also produces little clusters of tiny, pretty white flowers-I almost fell over when I discovered that my little basil plant was flowering. I had no idea that basil produced flowers! I'm not sure, but I think basil would look gorgeous if planted outside in a flower bed.