How do you imagine an American reacting when you tell them you're a pessimist?

Depends on who you're talking to from america. I'm sure it's the same as anywhere else....some are optimistic and some aren't.

It was optimistic until realism set in.

lol. I'm American. and a pessimist who says she's a realist. with only handfuls of optimistic moments.

Ha

yeah optimistic and delusional....even though they have the highest crime rate...serial killers...rape...
pretty optimistic people obsessed with safety and throw their freedom away in the delusion of being safe...