Fedora. Reason is probably that im used to it now. But if I have to make some points why then there they are:
- nice balance between being up-to-date and not bleeding edge
- new technologies. Fedora always pushes new technologies first such as wayland, pipewire, systemd... I like it. I dont have to wait 2 years until x distro rolls it. I get it now, sometimes with some problems but nothing that i couldnt manage.
- When im trying out some software or building from source the documentation often includes specific steps for fedora (among debian, ubuntu and arch). Its really nice to not be a niche distro and get instructions tailored for fedora. Also some pre build packages are often in deb and rpm. -im used to dnf and its few handy commands like dnf history etc. Im sure that other package managers offer similar solutions but i know dnf and it feels like home