To give a interesting answer, we like what we like. Biology, location, upbringing, family life, psychology and other things can influence who you like as a person. I've had the whole rainbow and I can say that all women are pretty much the same. There is some very minor differences depending race and religion and I bet the same could be said for men.
So do not feel ashamed, but for a guy like me who's been around America and Europe. I could be wrong about you but from the little I know about you I'm willing to bet that you've been picked on for being biracial, I'm black myself so I can relate. And from what i've seen with biracial kids is that they either go two ways in life. They either they try to cling to their white side and do everything they can to try to make the world forget they are part black or they go the other way like the rapper J. cole who was quoted saying
"I can identify with White people, because I know my mother, her side of the family, who I love. I've had White friends. I know people from high school that I might not have hung out with outside of high school, but I think I got to know them pretty well, so I know their sense of humor. But at the end of the day, I never felt White. I don't know what that feels like. I can identify. But never have I felt like I'm one of them. Not that I wanted to, or tried to, but it just was what it was. I identify more with what I look like, because that's how I got treated. Not necessarily in a negative way. But when you get pulled over by the police, I can't pull out my half-White card. Or if I just meet you on the street you're not gonna be like, "This guy seems half-White"
So welcome to the party, if you are ashamed of being part black don't be. There is plenty of upstanding black people out there (I'm an air force veteran studying criminal justice with a 2.7/4 GPA) that the news tries to hide from the world by only showing the negative side, but whoever you choose, make sure you are happy with them.