I like Ubuntu, we use (LTS releases) at work and it's been very stable and easy to maintain. It's also by far the most popular Linux distro for a lot's of reasons. Although i rarely use it at home (switched to OSX) I still keep myself updated and try every release. Imho i feel they should get more in the "latest technologies" bandwagon like they did a few years before Unity (for those who remember Ubuntu pushed always the latest GNOME releases with the latest technologies developed by RedHat and get it right even before Fedora) and upstart in order to not cause more fragmentation on the Linux desktop. Let's take Unity example: First was desktop on top of GTK2 which looked and worked better than gnome-shell. Then the transition of GNOME3 started and now GNOME was able to get a ecosystem of applications that fit's on GNOME not Unity, so currently GNOME apps don't fit on Unity desktop and even gnome-shell perhaps it's more useful than Unity. Same for upstart: It started as an new modern init system but then systemd came out and become the standard in Linux (or at least it's trying to). Now Ubuntu is migrating to systemd because their init system never gained traction. Not to mention the manpower they invested and now they don't get any result out of it. I fear the same will happen with MIR since it will NOT become the standard on Linux like Wayland.

For the future I hope Canonical don't pull the plug on Desktop and Server (which is also very popular) and give it's users the choice of using Wayland, GNOME, X11, systemd, XFCE, LXDE or other technologies instead of the "home made" technologies. Also let's hope for more bright 10 years ahead trying to get Linux Desktop in the right direction giving people a choice between Operating Systems.