I wrote about girly opinion writing in 2012, and the post still stands. If I rewrote the post I'd make it stronger when it comes to the negative comments female writers get on the Internet. Writing As Female has very clear additional hazards.
The post is also worth reading because of the way we label stuff girly or studmuffinly. That labeling often has no other basis than the desire to make our imaginary gender boxes have stronger walls.