I'll write about some versions of Fruits Basket chracters, with spoilers, of course.
Of course, there's male!Akito and female!Akito. I prefer female!akito because you can write in some nice gender issues there.
My favorite version of Shigure is dark!shigure- a chracter based off manga!shigure in which Shigure's dark side really shines. fun!shigure? I prefer him in fics that are before the current time line of Fruits Basket.