What form does anti-American sentiment (if any) take?
Expect complaints about the US government, as well as much making fun of America — however, I would be very surprised if anyone said it to your face, because that would be rude. Just be aware of one thing: we’re accustomed to joking with each other pretty roughly. Sometimes it borders on insult but we here are aware it’s in good fun, and it’s even a way of showing friendliness (something like “I feel comfortable enough with you to know you won’t be offended by my heavy humor”). It’s completely permissible to poke fun at someone’s religion or nationality, and people will often say things like “You look so ugly today!” in order to mean exactly the opposite. If you’re American, one of your newly-made friends may very well pop up one day with something like “Ah well, Americans never have a hard time solving problems anyway, you just bomb it back to the Stone Age and there’s no more problem” and not mean any offense or criticism, just friendly teasing. Feel free to jab them right back, goo