Agreed. I had a pretty strange experience in med school as the only Mexican-American in my class of >200. I guess I don't fit the stereotypical appearance that people had in mind. That whole issue entirely aside, the number of dumb**** comments I heard over 4 years was incredible. They came from all directions: "friends," girls I was dating, attendings that intentionally called me Chuy instead of my actual name. The one thing that really got me was when those people would try to strip me of my cultural identity by refusing to accept that I speak Spanish or was a "real Mexican". It's crazy but I could have a conversation with someone/in front of them with another person in Spanish and they still would try to deny my ethnicity because I don't "look" Mexican.
I'm not entirely certain if my appearance made people feel like they could say ignorant garbage without offending me, but it certainly seemed to. As if making a comments about "brown people" wouldn't offend me... Oh right, my mom is "brown" and my grandfather is bi-racial because Mexico is a country not a race and there are, in fact, black people in Mexico. Mind=blown. Wtf my blood pressure is going up just thinking about it.
People will assume you're only there because of affirmative action(heard that one myself), that you must have some experience with "the hood" or "the barrio" in my case and they'll assume that as a black man you'll be a key addition to their intramural basketball team because, obviously, you can dunk. You just have to know who you are and why you're there.
The one mistake I think I made was letting it create resentment and anger within me, because it did. I spent the last two years there incredibly defensive,angry and in the mind set that I was alone and was trapped there until graduation. So I can't stress the thick skin advice enough, I probably could have done better at it.