#2 - I have literally never met, in real life, a single black person that is the type of guy I go after. I don't think being black has anything to do with this, rather, my area is primarily yellow and white.
I have been thinking about this topic, but it occurred to me that I wouldn't not be interested in someone simply because he wasn't yellow. Any funny, interesting, or sweet, articulate STEM-y major/someone into tech, even if not STEM-y in college, that loved video games and sushi/ramen/coffee would catch my eye.
I guess what really happens with me is that I am particularly attracted to Asian-Americans, but anyone with those aforementioned qualifications are what I go after... and there's no shortage of those, so I've never had a scarcity of my preferred males and never had to think about dating "outside" my preferences.
I'm in OC too! I live in a city that is like 55% white and 43% yellow. I've seen maybe two black families in my life, and maybe three or four brown ones (in my city). Though, I think the city next to me is more like 30% or 40% brown. Odd.