My 2 cents on the race issue.........
In my frequent and extensive trips thru the DR I have noticed that in large measure, the girls are colorblind- they don't see white or black they only see one color - green! ;)
The socioeconomic conditions and the substandard level of education in the country make many of the girls rely on the help and companionship of tourists as a viable and consistent source of income with which they can use to support themselves and their family.
If you want to meet a sexy Dominicana than much more important than the color of your skin is your ability to communicate competently in the Spanish language.
If you can understand and express yourself in the Spanish language then the girls in the DR (regardless of their skin tone or yours) will see you as a potential and viable BF or long term love interest. If you cannot then it makes little difference if you look like Brad Pitt or Denzel Washington - you will be nothing more than a quick "payday" and a one night stand.
cheers...........:)