When I chose Blueberry(blue point), I had to choose between 4 kittens. We chose him because of his personality. He let us hold him, he wasn't the runt of the litter, and he kept on looking up at us. Our breeder specializes in blue points and seal points, and at that time, she only had blue points. We liked both, and since she only had blue points at that time, we just got one. Then my mom saw her seal point and fell in love with him, and wanted to get one. But we didn't I think both colours are beautiful, but I like the bicolour on the Ragdoll better.
But yes, you should choose based on personality, since both are beautiful anyways!
I don't think male or female matters, but my mom wanted a male because people told her that females can be moody sometimes. But its not true for all females.