U-S-A! U-S-A!
Work Work Work Work Work

Credit: moomsabuy/Shutterstock
Working like mad men and being proud of how overworked we are and how little vacation we take.
Also not having any mandatory maternity leave. (jaruvesma)
Say Cheese

Credit: PalatovskyStudio/Shutterstock
Smiling. As someone born in Europe but very much an American, it took me a while to get accustomed to it and I was reminded of this when traveling out of states.
Americans smile a lot when talking. To Americans, it signals that you are warm and friendly, seeking to encourage a conversation. To a European, it’s rather strange and a bit disconcerting to be talking to a stranger who is smiling for no apparent reason. It signals that you are superficial and disingenuous, like you’re trying to sell something… or possibly mad/dangerous. (Spectrum2081)
Smiling at strangers. Back in high school, I spent some time in St. Petersburg, Russia as a short-term exchange student. As someone ethnically ambiguous, I assumed most Russians would think I was from one of the Central Asian Republics, like Uzbekistan. Nope, they guessed American every time. “Olga, how does everyone know I’m American?” “You smile too much and have good teeth.” (WorldBestTop10)
I WON, YOU LOST

Credit: Dominick Reuter/Getty Images
Ridiculously long elections and treating elections like sporting events (discos_panic)
Americans treat everything like sporting events (Marvel vs DC, iPhone vs Android, Xbox vs PS4) I suspect they just love competition. (dubjon)
Capitalism is all about competition (gullaj)