Sign I've been working at this job too long:
I'm actually surprised/amazed when I read or hear that someone's taking a sick day off. It makes me sort of blink at the screen a few times as a question runs through my mind 'Sick days? People can still take those?' Then 'Oh yeah. They don't work HERE.'.
I've been working at this job for two years now. Two years. Total sick days taken: One.
That really sucks.