Hello (sister|brother)!
I have Bipolar (I). It's not "only" bipolar I or II, they're both terrible (so I'm told, I've never been "not bipolar"). You've really hit the nail on the head. I could waste bytes with more words of agreement, but you've covered it pretty well.
Manic-Depression is one of those turns of phrase that really illustrates how clumsy human communications are, given our single frame of reference.