Tell me why I don't like Mondays. It's not like there's a soulsucking job I have to go be browbeaten at...

Habit. Yeah, your head knows there's no "seriously not-fun thing that you must get up for." But I think that after years of school (which they start at an insanely early hour when any respectable teen-ager should be asleep) and then more years of slogging at work, your psyche just doesn't recover from it in a few measly months.