Hmm... I get "mistaken" for being Chinese, but I wouldn't call it mistaken so much as willful ignorance. Most people with any bit of sense will refrain from making assumptions about my race, and those who do make assumptions only do so to make rude or derogatory remarks. If someone calls me a "chink" I don't ever really figure that they really believe me to be Chinese. More that they've decided to clump every Asian looking person into one group and figure that one nasty term should cover the whole lot of us.

Generally, I think that I look very Korean, and most Asian people I encounter agree with me on this. Very rarely have I had another Asian person believe me to be anything other than Korean. Non-Asian folk have a bit harder time placing me, but most of the time, they'll ask politely rather than making assumptions.

And as a side note, these sorts of conversations haved played out for me numerous times in my life:

RandomPerson: Where are you from?
Me: Los Angeles
RandomPerson: No, I mean, where are you REALLY from?
Me: I'm REALLY from Los Angeles.
RandomPerson: ... are you Chinese?
Me: *walks away*

Oh and it really pissed me off when people try and talk to me in Chinese. I don't go up to random European lookin' people and start speaking French. Like, wtf is that all about? Inevitably, I get this from old American white people more than anyone else.