I grew up in the Midwest, in Michigan to be specific, and I lived in a few different parts of Michigan, including Troy, Auburn Hills, Detroit, Belleville, and Ypsilanti, where I currently am for college. I also lived in California from 2007-2011 after my parents divorced, and my mother moved there.
Before I go into my experiences with different races of women, let me say a little bit about myself first. Excluding watermelon, I pretty much do not fit into any of the stereotypes of most AA Males. I don't like sports much. I don't mind playing them sometimes, but find no joy in viewing them on TV or events, nor do I enjoy rap, or hip-hop. I grew up enjoying anime, video games(namely JRPGs, sonic, and Nintendo IPs), and browsing the web. I would also like to say that the potential is generally there for me to find women from any race attractive and/or desirable. While I have African American Women squarely at the bottom in terms of preference, there are still plenty of African American women that I find attractive(at least in the physical sense). The main thing keeping me from being more interested in them is by far interests/behavior. Where I have lived, most African American women women(and men) in general seem to have very similar tastes, most notably being rap, hip/hop, sports and many other things I have no interest in.
Particularly in Michigan, due to obvious reasons(i.e., past racism), coupled with the fact that many have come from poor households with a low standard of living, they often bear much resentment toward Caucasians, which due to my fortunate upbringing, is something that I do not share in, with the majority of my friends being Caucasian, further driving a wedge between them and I. With the prevalence of these traits among most African Americans I meet, particularly the women, there are generally very few women that share enough in common with me to even hold a decent conversation with, let alone develop any sort of relationship with. So to summarize, among African Americans where I live exists a highly prevalent and insular culture opposed to my personal culture, which keeps me from actually finding anyone of mutual interest most of the time. While I noticed that when I moved to California, most African Americans I met had a higher standard of living, which meant significantly less people of the former category, particularly males, I still very rarely met any African American women that I had anything in common with.
Somehow, I feel like the explanation for other races will a a lot shorter. I haven't really talked to many Middle Easter/Indian women, although I do have a few in some of my classes, but I really don't know that much about them, and meet so few of them, that no relationship will probably ever happen on that end. Most of them seem to maintain their traditional garb rather than adopting a more western style, which might imply insularity, especially seeing as many of them seem to have moved here directly from their respective countries for schooling.
I don't really meet very many Latino people where I currently live, although I did meet many more when I lived in California, and one of my better friends that I have somehow managed to keep up with considering how anti-social I can be, is Latino. I find a good amount of Latino women to be attractive, but don't meet very many that share common interests, but I did meet a few that did when I lived in California, but that hasn't transferred over to Michigan, so the likely hood of being in a relationship with a Latino women for me is relatively low as well.
As for Asian girls, it's probably just the weaboo in me, but I find them to be particularly cute and attractive and whatnot, but I rarely meet any, although probably more than any of the previous races, bar African Americans, and most of them seem to be transfer students from their respective countries like many of ME/Indian girls I see around campus.
Also, I tend to be even more self-conscious about talking about anime or most of my other interest with them, because strange awkward reasons that I don't feel like elaborating on(Basically, I'm dumb) so I don't see myself dating any Asian girls either(Unless I end up going even further in my Japanese classes, and end up teaching English in Japan or something).
As for caucasian women(and also men), due to being the majority, have little to no insularity where I live(and probably everywhere else), so they are the most varied in interests and culture and whatnot. Most of the people I have met since coming to college, male or female, that share my interests, have been Caucasians, with minorities probably only making up about a measly 10-20%. Therefore, statistically, considering my personal likely hood of meeting women of common interest by race, I would likely end up in a relationship with a Caucasian woman, provided I can even get a girl
's romantic attention.(I actually did ask a girl out recently(Caucasian). It was a no, but it was my first time, so I was pretty happy with myself for finally man-ing up enough to do so. Kinda sad though that I'm 19, and only just now getting around to this)
Anyways, not sure if this was particularly helpful, but I hope it might at least partially helped to answer your question.