Available at: Suck UK http://www.suck.uk.com/product.php?rangeID=154&rangeNew=1 ($16)
This is the perfect card to thank a friend for a lovely dinner party. Look how happy that cat is to have eaten such a delicious meal!
He doesn't really look like he wants you to have a nice day, but the sentiment is there.
I'm happy I haz you.
Available at: MimosaCards http://www.etsy.com/listing/57201344/cheeseburger-cat-im-happy-i-haz-you-set ($12 for a set of 10)
Every piece of paper, if these were left on my desk would say "HUNGRY".
There's something undeniably charming about chopping the corners off a rectangle and calling it futuristic.