I have no problems whatsoever, so I guess it's quite severe or not at all. It's pretty much all I know, almost all I remember (I remember 3–5 years or so before onset, so I can't really tell: those were different times). Any stability may be mania/psychosis. How would I know?

They are just challenges and things just are.

That acceptance might be signs of great severity, but many with more severe and longer depression might be worse off, because they don't accept it as much.

It's a mix. One isn't necessarily better than another. I like mine, though it's hard. But when it's hard, suffering can become almost enjoyable.

Edit:
If functioning differently is a measure of severity, it's severe. But functioning differently can be very valuable and rewarding. It's just more of a risk.

Another edit:
Often paradoxically, it's not about the options you have, but those you see. That's why BP-II might in some ways be more severe than more psychotic flavours. But then anything more normal might be worse still.