By the time I was 11 or 12, I was staying up 'til 2am, sometimes later. It just seemed natural to stay up and read, and if I tried to get to sleep, I'd just lie awake anyway. Why waste the time when you can instead do something useful or interesting? IIRC, this is at least in part part of being a teen going through puberty - your body's melatonin production kicks in later in the day, and most teens can't get to sleep 'til after midnight (although of course there are individual variations). It never seemed to stop for me, though. I'll still happily stay up 'til 1am or later into my 20s, but I try to force myself to go to bed earlier nowadays. Since we got a dog, I need to get up at 5:30am to walk her. Still, I'm rarely in bed before midnight, and I feel like I spend most of my time as a zombie, feeling like crap because I'm so tired. I'd always assumed this was just me, and in part it's simply a time crunch these days, there's too much to do and not enough hours to do it in. Still, I need my decompression time at the end of the day, which means if I don't get hosehold chores done 'til 11, I'm likely to spend another hour just processing the day before I go to bed, and that I suspect is an AS thing.
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"You're never more alone than when you're alone in a crowd"
-Captain Sheridan, Babylon 5
Music of the Moment: Radiohead - In Rainbows