Beyond that, moods are a relatively subjective experience and their expression is probably culturally determined. The American culture thinks a psychiatrist is the solution to every problem.
Most European cultures consider it a last resort.
Interesting that Freud and Jung were both Europeans. It's whatever works best and is available for the individual I guess. Generally, I think psychiatrists are good people with a special point of view about how to analyze and solve problems and access to mind-altering substances, but I don't know enough about it to give a really informed and objective point of view. That is my long answer to calling something a mood disorder, but I wish that others would offer their perspectives as well.