I really really love the pictures, but I am disappointed about your explanation why you wouldn't draw male characters in princesses' outfits - that you didn't like men in women's clothes. What's the difference? Why the double standard? How is it cool to have women wear "men's" clothes but not the other way around? Do men wearing costumes that are associated with women threaten the idea of masculinity?
100 years ago, people were disgusted and outraged by seeing women in pants= "men's clothes"; police arrested them and other men attacked them for wearing pants. It were women who fought for the right to also be able to wear these clothes, and today, it is normal. Where are the men who want to conquer and occupy dresses and skirts? Men who DO wear those outfits are often attacked and beaten up, sometimes killed - by other men. It is outright DANGEROUS for men to walk around like this, and often people make the (wrong) assumption that they had to be gay. Masculinity must be very fragile if a man in female-labeled clothes is such a no-go for most, and people (mostly men) express their disgust by it.
But pictures can be so powerful. They can change conceptions and opinions and open one's eyes. The ones with the princesses in the guys' outfits are all of this. Therefore, it would be as powerful and maybe more so, - in fact, empowering! - to see the princes in dresses.