OMG, the first day of preschool!
I STILL remember the first day I sent my son off to preschool. I got the weepies, y'know the "my little baby is growing up." And considering what a PITA he was, you'd think I would have danced all the way home!
How much of a PITA was my son? Put it this way, eventually, he was expelled from the preschool (seriously).
Staying at home with kids is a frig load tougher (mentally/emotionally) than any 9-5 job out there. At least with a "real job" you get to go home at the end of the day!