against cheerfulness

Against cheerfulness - местами забавно, в частности про бой-скаутов: The lifting of mandatory cheerfulness reflects contemporary British culture, just as the policing of cheerfulness in the US reflects ours., см. Scout Law - Cheerful

ну и очевидное

However, books on how optimism can be learned make millionaires out of their authors. They tell us that the key to happiness is positivity, and that the key to positivity is cheerfulness. The aorta of the US economy pumps out optimism, positivity and cheerfulness while various veins carry back US dollars naively invested in schemes designed to get rich quick, emotionally speaking.

кроме того много познавательного: Minnesota nice, white knuckling - понятно, но я не встречал раньше.

а почему kumquat - ответа я не нашел