There's two I like in particular as an American, but mostly because their counterparts are ruined.

'Good on you' is the biggest one. 'Good for you', especially in text, to me comes across as bitter or sarcastic because of how often it's used that way, whereas the other doesn't.

'Mate', while I don't use it, is a solid word. We have buddy, pal, guy, etc, but again, they can each have their own negative connotation. Maybe 'mate' does too, but it always seemed like a neutral, friendly word.