I've mostly worn girls/womens jeans most of my life as hey always fitted better. Started off when I was about 10 as I ended up wearing my (girl) friend's jeans, my mam noted how well they fitted so only bought me girls jeans from there on in. As I got older I just carried on buying mostly womens.
I've been on low level NBE/HRT now for nearly 2-years and mens jeans no longer fit at all, so its womens jeans and leggings now all the way