I used to prefer males over females since the female's symbol and color used to bother me a lot. I liked the blue color and the male symbol since I thought that it matched very well with the HP bar and everything. I don't really care that much if its a female or male anymore. It still happens that I get this ''Oohh..I really wan't a male, oh well..'' feeling tho but I'm getting used to female pokemon. If there is a pokemon that has to be a female in order to evolve to a curtain pokemon then I'm using that pokemon as a female.