The amount of presumption that I have to deal with from strangers on a regular basis is still disturbing. Such interactions only comprise a small fraction of the total, but a modern urban setting is sufficiently populated to generate a regular supply. No, I look nothing like Jackie Chan. Please don't treat me like someone wearing a costume at Disney World. I'm not a cartoon and I'm not your instant Asian friend. Yes, I was born here. English is my first language. I know next to nothing about martial arts. I'm not bad but still not that good at math. No, I don't think I'm better than you, I don't need to be shown up, you're not making the world a more beautiful and better place by doing that. (Still, all of those are better than the instant Asian=target of abuse idiots or the weird psycho-sexual vibes from certain kinds of middle-aged white guys.)
I observe the little dance that people go through when they get to know each other. I notice the little verbal and non-verbal signals being passed and being noticed. I'd really like to notice more of those transactions and stop wondering about their relative lack coincident with these big globs of presumption coming out of nowhere.