It's bizarre, but despite my having a work schedule considerably offset from the norm, I still feel bad about being up past 4 am, even though it's been less than three hours since I got off work. I feel equally bad about waking up past noon. It's as though offsetting my sleep schedule, even in conjunction with work, is not allowed. Maybe I'll feel better about it when I'm living on my own.
And hey, though I feel bad, at least I don't feel like a worthless lump, as I would when staying up past 4 and waking past noon in my jobless state. This is a "sigh and shake my head" bad feeling, not a "stare paralyzed at the vast blank page that is my future" bad feeling.