I honestly think it is a personality thing. I always thought I would want females because they would be more affectionate. Our two males are real snugglers so that blows that theory!
As for spraying— in general if they are neutered it shouldn’t be a problem. Our Zipper is a “high rise” pee-er. He tends to stand up when he goes so we modified the litter box by extending the sides. Problem solved
