A bit of everything during the last couple of years. After Gentoo, which was my distro of choice for a long time, I used frugalware, which is slackware-ish but with pacman and an "easy" installer. Then I got a laptop and a 3g USB modem which would only work properly with NetworkManager, so I went around between distros that packaged it (Fedora, Ubuntu).

Now I run emacs on CentOS 7. I only do security updates and have been using guix to handle userspace (Userspace = mostly emacs).

For work I have an Ubuntu laptop. We code pascal, so I almost never leave the GUI. After configuring Unity I actually like it a lot. I might switch to ubuntu on their next LTS release (which, after all the kinks are worked out, will be 16.04 + ~4 months)