Glib(tm), from Moodco., makers of the wildly successful Melancholy(tm), Passive(tm) and Morose(tm).
Fedulistic - For when you've just had a large piece of wood fall on you and you don't know how to react.
Rexular - For when you're sort of happy, but sort of too afraid to really be happy.
Veee - Happy yet sad, mixed with a tinge of surprise and just a little smattering of anger. May contain traces of apathy, solemnity and/or bitterness.
Yafeyafe - For when you really miss something (usually a goat; possibly lawn furniture, particulary when lawn furniture was designed for goats).