Like has been said already, it depends where your priorities lie with your operations system.
Do you want something super stable that basically just runs without issues? Go with something like Debian. Downside is that you will have to wait for the new stuff, since priority is stability.
Do you want bleeding edge stuff? Go with Arch. However, be ready to spend your weekends fixing your OS because something broke.
Do you kinda want something in between? Go with something like Fedora or openSuse Tumbleweed. Relatively stable yet pretty fast to update.
Like has been said already, it depends where your priorities lie with your operations system.