When I was born, what we called "Mixed Marriages" were unusual: In fact, in some states, they were illegal. The thing is, by the time I married, Loving vs Virginia was already a decade old. So why didn't I marry a minority lady? Because I never clicked with one. I didn't frequent the same places that minorities did: I wasn't a college student, I didn't socialize with co-workers, and, because I lived in a small town, the minorities didn't frequent the local head shop I hung out at. When I decided to marry, I picked a women within my circle of friends. Chances are, if my circle of friends were diverse, I probably would have married outside my race.
The key here, though, is not so much limiting your choices, but looking for someone that you actually care for. Race wasn't on that list, otherwise I would have headed west and sought out an Asian lass. Or Hispanic, or NA, or black. Race isn't a problem for me. I treat every one based on their attitudes. The color of their skin doesn't matter. If it did, I'd have to disown most of my grandkids. Four of them are African American ancestry, four of them carry Native American ancestry, and only one is full European stock.
Race as an issue? I thought marriage was supposed to be about love. Marriage is about setting what goals you want and finding a partner to help you achieve those goals. Marrying strictly because of race leads to problems. My oldest was married to two black men. I think her reasoning was to piss off her grandfather. She may have wanted to piss me off as well, but it didn't work. Next time you get into one of those discussions just ask why marry based on race. Why not marry because of love.