I don't have much of a pattern either, but I'm usually dysphoric most of the time and mixed, or cycling so rapidly I can't tell where one ends and the other begins.

But I think any time someone says "This is what is normal for people with BP," you're going to meet a whole big lot of us that go, "Huh? I don't do that." There is no "normal," we all go through this in our own unique blend of shifting and variations.