I feel like there's the potential for a post titled X Times Joss Whedon's Shows Would Have Come Under Fire From Anita Sarkeesian But For The Fact That He Gave Her Nerd Cred.

Off the top of my head (spoilers for stuff that's at least 5 years old):

• Turning Willow gay instead of Xander on Buffy, because lesbians are hotter.
• Firefly - while both Mal and River are shown naked, Mal is totally cool with it, but River is all vulnerable.
• Dollhouse. Like, f*cking all of it.
• All of the (mortal) female characters on Angel die, while at least one mortal male character is still kicking at the end of the finale.