... make me happy. Especially these, which I think are hi-larious. You can find them all (and more) through KnockKnock. Some of their stuff is kind of cranky, but the ones pictured below make me laugh.
Can't you just picture yourself checking the boxes and happily slapping one of these on someone's computer monitor?
I especially love the little 'P.S.'-type check boxes in the lower right-hand corners.