Gentoo is awesome. I'm a big fan of the amount of control it affords me over what it installs (i.e. it allows really focused, minimal base installs), and I generally find the package manager really nice to work with (definitely nicer than yum, or even brew). To be fair, I only use it on servers; I could imagine having to compile Gnome or KDE is a little more bothersome.
Note also that e.g. CoreOS and ChromeOS (or are those the same these days?) are built on Gentoo technology IIUC.
Thanks to all the developers who helped put this release together!