Did you think before pick Black or White up?
I started to play White instead Black and I didn't make that pre-analysis, which should be about the exclusive Pokemons.
Sincerly, when I picked White up the main reason I used to choose was the feeling of the color. White is about to mean peace, purity and clarity as long as black color is about to mean darkness, obscure, solitude.
It has no sense with the Pokemon games, I KNOW THAT, but this was the first thing I thought before choosing between them two, so White was chosen. Of course.