Have you ever experienced a friendly greeting extended by someone you don't know? For example, when you walk along the streets in the neighborhood, a stranger would smile at you, nod at you, or even say "Hi" to you. Or, when you ride an elevator, someone may smile at you or greet you on his/her way in the elevator.
You might think this is quite natural, and people are just being friendly. For me, this is actually one of the "cultural shocks" for living in America. This would never happen in Taiwan. If you smile and greet a stranger in Taiwan, people would think you are either crazy or a street salesperson. It took me quite some time to get used to this new habit, but I really like this custom and I think this is one great way to demonstrate the hospitality in an American style.
The first time a stranger said "Hi" to me, I was startled. I didn't even have the time to react and smile back. I just kept thinking who that person might be. Now I am accustomed to this friendly behavior, and I smile and say "Hi" to the strangers I pass by, too. Of course, this does not happen everywhere, especially not on the busy streets downtown. But when it happens, it does make you feel good, right?