I'm torn. I'm ML but I'm all about that leftist unity and I love my anarchist comrades. So in that sense, I do really prefer the red/black flag.
But then again, damn that all-red flag just looks so damn good. It's simplicity really gets the point across. And the all-red flag does have some links to the anarchist movement in the 19th century, IIRC. Not to mention fucking ancaps have co-opted the black for their lame ass yellow/black flag. It sucks but I despise them so much.
I dunno, what do you all think?
for real though