I don't see why you have to be chronically negative to believe that a smile that isn't genuine is necessarily "false". When referring to a genuine smile, we usually refer to a Duchenne smile[1] — one in which the muscles around the eyes also crease. Just because a smile isn't on the spot genuine doesn't mean it's false, as the thought behind it can still be there.
But it's also important to note that this is an expectation of your culture — it's not as obvious to me that smiling all the time is necessarily a "happiness" thing. Surely you must be aware of the stereotypes that are held by other cultures of Americans?
The fact that you see Russians as people who suck the life out of the room, just suggests to me that you are projecting your expectations of societal norms on other societies — where they don't necessarily fit.
But it's also important to note that this is an expectation of your culture — it's not as obvious to me that smiling all the time is necessarily a "happiness" thing. Surely you must be aware of the stereotypes that are held by other cultures of Americans?
The fact that you see Russians as people who suck the life out of the room, just suggests to me that you are projecting your expectations of societal norms on other societies — where they don't necessarily fit.
[1] http://en.wikipedia.org/wiki/Smile#Duchenne_smile