About 48 hours is my maximum, but chemically strung out. Without that I have had plenty of sleepless nights though, sleeping isn't one of my strong points.

I really regiment myself so that I minimise excessive 'staying awake'. I force myself to go to bed before 10:30pm on worknights. Even if there is an hour of sleeplessness I am at least comforted in knowing there is no pressure to sleep. Sometimes I just can't drop off though and occasionally it can be a night with the bare minimum of sleep. You feel like shit the next day.

I would much prefer it if there were more than 24 hours in a day. 30 would be ideal for someone like me.