The secret of Fate/stay night is that they took eroge characters and reversed their genders
if Saber was male, he'd be the awesomely silent/cool/calm guy.
When he rushes that Berserker with Excalibur ready sacrificing his life ... that is the scene where MANLY TEARS flow for A MAN'S WAY OF LIFE AND DEATH.
Rin, if a man, would be an awesomely HOT BLOODED mage. And pervy with his advances on Shirou, but a little tsundere.
And Shirou, as a weak little girl, as a girl, puts it into context. You'd be fapping furiously to Shirouko every night because of her shy demeanour
And with girl Archer, Shirou x Archer would be amazingly hot.