I am not an American but I have some idea. Let me list them:

- Pride of national armed forces

- America flags outside houses

- Tailgating

- Extensive participation in volunteering

- Jazz/Blues/Hip Hop/Country

- Stand up comedy

- Improv comedy

- Fortune Cookies

- Deep Dish Pizza

- Sports Watching Craze

- Little holiday

- Guns, Guns, Guns

- 1st Amendment

- Religious

- College sports

- Road Trip!

- Weekend sports

- Hipsters

- Shitty Cable News

- High quality ethnic food/fusion

- NASCAR

- Dive bars

- Addiction to pharmaceuticals

- Friendly, easy smiles

- Cars, Cars, Cars

- Kids Lemonade Stands

- Walmart

- Fields of corns

- Scumbag food corporations

- Keg Stand

- Fake ID

edit: formatting