I really have no idea. I don't think I'm euthymic very much. I'm pretty-much always in at least a mild state of internal agitation. I'm never depressed in the typical sense of the word. My depression tends to express itself as generalized anger. Occasionally I'll have little bouts of what I presume might be considered hypomania. I've had these little episodes for as long as I can remember. And I've spent lots of sleepless nights building castles in the sky as a result of them.