This post has been very helpful to me as well. I am recognizing my hypomanic behavior. I get very playful and silly and motivated for a few days and then I get very irritable, I get angry easily and little noises bother me, like my 7 year old drumming his fingers on the table, etc. I annoy my husband by poking him or finding a feather or something to tickle him with, thinking I am being funny. I'll start projects around the house, and I used to go out and get a new career when the economy was good. I don't spend wildly, but I'll buy supplies for a new career, like getting the books needed for personal training, beads and strings for jewelry making, etc. I'll buy a new outfit because I feel so good, I don't want to wear the things I wore when I was depressed. The biggest thing I spent on was taking out a loan for massage therapy school. I dropped it after one class, and was able to give most of the loan back, but had to pay about a third of it off.
Then I'll usually get to the annoyed, agitated stuff, have outbursts of rage, unwanted thoughts, and soon after I go into a depression.

I think I am rapid cycling and have had at least one mixed episode that lasted a few days.