Much of the literature on fan fiction sees slash fiction as transformative because of its imposition of a queer framework on heteronormative texts. While I do not disagree that this is one way fan fiction can be transformative, it is a mistake to believe that slash is inherently more transformative than het or gen fic just because of its queering of canon.
Emily Regan Willis, Fannish discourse communities and the construction of gender in “The X-Files” (via fanhackers)