About 6 - bed around 2am-ish, up at 8am-ish. I often have a 30 minute nap around 9pm.<p>Any more and I have a sore back and a foggy head, any less and I have a foggy head!
An actual poll from a few weeks ago:
<a href="http://news.ycombinator.com/item?id=328901" rel="nofollow">http://news.ycombinator.com/item?id=328901</a>