Emoting snakes

This is a few years old now but I thought I might use it for my (Chinese) New years cards for this year. I'm always too late for the main body of the festive season but I do love sending out xmas/postcards.
EmperorNorton - I still owe you one. Hopefully your address hasn't changes in the last three years -_-

The concept behind this was a challenge from a lecturer to draw four snakes depicting different emotions - The thoughts run from top left clockwise

"Aww. Why is half the cocoa gone?"
"Who dared drink my cocoa?!"
"There's cocoa?! :3"
"It wasn't me!!"

A class project at the time was on painting skys. Hence the design on the cup.