Size, size, size. For me there is such a thing as too big. I don't need some dick that hurts me. There is only so much room in there and when it fits snugly without being painful, I'm all for that.
I have spent quality time with an International assortment. American including Native, Canadian, European, Middle Eastern, and Latinos. Black, white, brown, and a funny shade of pink. The smallest I ever encountered was from a black guy who lied like crazy in conversations. I mean small and I had to walk away. He fit in the reasoning of not being interested in Asian males. The biggest was a Latino that I had to just spend an evening or oral because it wasn't going to come close to getting inside me. Next biggest was an Egyptian who was almost too big and made me set my limits for largeness. Biggest acceptable was from India. Very fulfilling. When it comes to white guys, some are bigger than other races, some not. White guys for the most part do not just take their dicks for granted. They seem to be the best at trying to do something for their partner. Most times that is more satisfying than being stuffed with a big dick.
My preference is white males. My least favorite is Asian males. Not because they are smaller in the penis department but because they don't realize how small they are because they only compare them to other Asians and think they are big. Plus, they get rather egotistical coming from their male dominated cultures. Not out to hurt any feeling, just giving my preferences or opinions.