Favourite author gender and genre

My usual "go to sleep" tactic is thinking about something interesting but unstressful, e.g
"What would I do first if I won the lottery?", "what tracks would I pick for desert island discs?", "can I think of perfectly normal backgrounds for RPG characters (rather than the cliche traumatic ones like [bad force] murdered my village and I want revenge!)"

Recently I was thinking about my favourite fantasy and SF authors and noticed a funny disparity - see below.
( The lists )

My fantasy list is pretty gender balanced. My sci-fi list... is not. I think a lot of it comes from sub-genre preferences: I'm mostly into military SF which I can imagine being less common for female SF authors. ("Some Desperate Glory" by Emily Tesh was one of my favourite books last year but I won't put her into the favourite author list while I've only read one book!)

Interested to hear if other people have similar differences between genres or if it's just me!