Arch. Of course arch. Just like everybody else. Or rather, not like everybody else. That's the whole point of arch. The wiki is a godsend, the AUR is excellent, the system is simple, and all the distro-specific tooling is incredibly well designed, to the point that I can forgive adopting systemd as a default. Besides, you can always change it.

I also run i3 as my desktop interface, and hats off to those guys, it is amazing. You should check it out, if you're into tile-based window managers, and good design, without the horror of configuring dwm.