Typically, I stay up much longer than I should and then crash for much longer than I should. I find that I tend to hate sleeping unless I'm already asleep so I tend to put it off for as long as I can and then milk it when I crash. In my heyday, this meant I averaged about two days straight awake and then about half a day of sleep (sometimes less if I got plans). However doing this for years and cutting caffeine out of my diet, has lead to my average being just about a full day before I crash and fall asleep, it's pathetic. Though I only milk sleeping when I have nothing going on, so on the sadly rare times I'm busy my allotted time to rest is cut short.
Probably should gain a regular sleep pattern, the few times I've tried have lead to positive results but each time I start one it takes less than a week to reset to my default setting.