What time is it?
Last night I did something I haven't done in a long time... I stayed up to 2am, on a week night, coding. It caught me rather off guard. I was getting into bed when I looked at the clock and it said 1:50am. I stopped for a second, thinking it must be an hour ahead. But then I remembered seeing the clock on my laptop's taskbar at 12:59am, and thinking to myself it was time for bed. But then I got into the "ohh, just do this real quick... and that... and this... one more" and when I finally shutdown and crawled into bed, it was almost an hour later.
I haven't done that in a while. Nowadays, if I'm on the computer, I'll be falling asleep at the keyboard by midnight. Before I was married, I used to stay up until 2-3am every night, and most of the time was coding til then. I used to have people rag on me for making forum posts on CommunityServer.org at 3am. There were times I'd be just going to bed as Scott or Rob were waking up in the morning.
The change wasn't really that I started sleeping more, but more that I shifted my schedule. I get up in the morning earlier than I used, and so I tend to go to bed a few hours earlier than I used to. Though it still gives a small sense of satisfaction when you roll into bed in the wee AM hours after a good coding session.