There is a person I always run into at the bus stop on the way to work, and who my husband and I often see at the local bookstore. He is mentally retarded, and is also the friendliest person we encounter in either of these places. He always says hello, and smiles, even when everyone else is intent on going about their business, and ignoring everyone else. At the bus stop, he's always playing music and dancing exuberantly - it always puts a big smile on my face, before work. I will try to be more like him. :-)