Fay is your typical handsome guy, while kurogane is effin cool :3
My favorite is ada-chan. : D
But, actually, I have a fondness for Saber from Fate/Stay Night that I can't quite comprehend(and I'm referring to the VN, not the anime). But regardless, it's difficult to pick just one... >>
As for guys... um... I really hate those guy characters that try to protect everything when they're useless so someone like Sakamaki Izayoi from Mondaiji is good in my book.