Debian.

It's pretty great for desktop stuff these days. Basically Ubuntu minus the shit. Any desktop you want, it's got live installers now (several different ones with different desktops), it's got nonfree firmware on the disc, they've really upped their game.

(And if the recent systemd stuff skeeves you out, you can toss out systemd, even. It's not for the faint of heart though.)

-- Frost