Moving to KDE
As much as I like Unity, I've decided to migrate my computers to KDE for the foreseeable future. The reason behind this is mainly Compiz, which I find has lost some stability over the last few months.
On my desktop PC (with a NVidia GTX560), Unity ran pretty well. That's until I decided to upgrade the NVidia drivers to their latest version (346.16 from Xorg-edgers) which resulted in many glitches on the desktop, which were only happening using Compiz.
On my computer at work (with a low-end Geforce 210), I often had Compiz eating half a core for no good reason.
On my Thinkpad T60 (Radeon X1300), Unity never worked well. I wasn't satisfied with either Gnome Shell, XFCE or Openbox.
After migrating each of these machines to KDE, I'm now perfectly happy and have found stability, speed and a fully usable desktop.
Good thing that KDE is very customizable, because I'm not really a big fan of the default setup. That required changing many settings in order to get the right look and feel: Numix theme, OpenSans fonts, dock on the left side, grid workspaces, keyboard shortcuts, window buttons. I haven't changed my software habits in any way, using mostly GTK programs (with the exception of Dolphin replacing Nautilus). At the end of the day, KWin is an excellent WM, just as feature complete as Compiz but with more stability and speed.
Window manager issues set aside, I'm also future-proofing my desktop. I'm not sure I want to be an early adopter of Unity 8 and this whole convergence thing. I like my screens big and my keyboards mechanical. On the touch device side of things, I'm totally sold to Android Lollipop and the whole Material Design looks.
Ubuntu Touch might become something really good but as with earlier versions of Unity this will take some time and a few iterations. Meanwhile, I need an environment I enjoy using, letting me having an optimal workflow (and also great gaming experience), that's what KDE provides today.