Try looking up a Buddhist congregation in the United States ... or maybe elsewhere in the world. Am I wrong or does damn near every instructor or guru or lama or holy person associated with such a group -- the guys or gals in the leadership role -- have a smile on his or her face?
This seems to suggest that Buddhists are happy or nice or something similar in a positive realm.
Not a single statue said to represent the Buddha has a smile on his face. Or I can't find it on the giggling god Google. Not one ... unless we're going to call Hotei as an emanation of the Buddha.
If you were a leader of some sort, someone who emulated chants and robes and meditations and thereby asserted a comradeship with Gautama and was into Dharma PR, wouldn't you want to wipe that smile off your face and get with the Buddhist program?