I use Arch Linux on my desktop and laptop. My servers run a mix of Debian and OpenSUSE.

On desktop: KDE because of the amount of customization that is possible. I've been trying window managers but I haven't found one I like yet.

On mobile: Phosh because it feels a lot more complete compared to other options.

Here are the other two links for anyone searching: here and here

In the early 20th century, they used to extract CEEs from pregnant mare urine for HRT. And now we have all the cool modern stuff. Here is a Wikipedia article to get started. I also recommend researching ancient transgender history for more info since it is really interesting.