My upswings too are clear cut as either:

a) euphoric giddy; the center of attention or socially cool gal
b) hypersexual with a HIGH interest in unavailable non-marriage minded men
c) super anxious, rapid speech, self injurious by stupid mistakes while rushing
d) extra sharpened skills; irritated with idiots around me who are too slow to catch up with me

I'm fully functioning during both up and down, but my depressions are not clear cut other than my complete lack of sex drive and lack of desire to attend social events. Out of a need for normalcy, I force myself to partake in healthy activities and then may begin to return to baseline for a short period during these events.