I've got a major lovehate relationship with it. I've always loved middle of the night--when I was young and supposed to be in bed by like 9pm, I was besotted with the times between 10pm and 1am. Then when I could choose when I slept, I tended to like 1am-2am best. Now I do still like that time, and even 2a-4a, because there's just something so quiet and sort of otherworldly about it. And I still think I have the childhood reaction of it's a nifty forbidden time because I shouldn't be up then but still am.

But 4am, getting to 4am-5am actually also has negative connotations for me--usually means I'm hit with insomnia again, and thus dealing with anxiety, stress, bad mood swings/depression issues. That late, and means my sleep cycle's screwed up again, and it'll take many days if not a couple weeks of feeling horrid during the day trying to force myself to sleep by 1am and be able to get up at 8 or earlier. It's been especially a problem since becoming unemployed, where it's super easy to fall out of a 'normal' schedule and end up nocturnal. I think I actually would prefer to be nocturnal, but then I wouldn't sync up with the husband' or my friends'/family's schedules. : /

Intriguing that it's a time when you get your best ideas--usually even if I'm up past midnight-2am, my brain starts acting/processing like I'm drunk. It's definitely fascinating how differences our biochemistry/genetics show up like that :D