yea..I tried unity when it first came out, and a couple of times since then...I liked the concept, but didn't like how closed up it is as it relates to hackability. I too like to tinker, and am constantly trying stuff (sometimes to my system's demise) I've been using Xfce for years, and felt much the same as you did; that I had tinkered it to the edge of it's capabilities. I installed i3 when you posted that second video out of curiosity, got to tinkering with it, and thought I'd use it as a second option to Xfce for when I really need to give my apps the power, but now, after my yearly fresh Arch install (the other day) I'm running i3 exclusively. I've always been a fan of Openbox, and thought if I'd go for a standalone wm, that would be the way I'd go, but I can't get over the responsiveness of i3. My challenge right now is to figure out how to make the default layout "tabbed" instead of horizontal.