I identify myself as a "manic-hibernator". Time will pass and I'm not interested in anything. Then, in a sudden flurry of activity, I'll do enough of whatever I'm doing to more then make for the dormant period of time I was in. I was talking with Vienna about this; I think she is the same as me in this respect. What happens is you're in a manic period where you're compulsively overachieving. Then, when you go dormant, your boss calls you in and gives you a promotion citing all of your hard work. This blows your mind since you're expecting a reprimand for for surfing blogs for the past 4 days in a row. Joel Sposky had an article that I somewhat relate to this concept.