I used to rave about the old Blades interface and how, OMG, Microsoft made a great user experience, and how weird it was for me to feel so strongly positive about a Microsoft consumer product. So of course they destroyed everything about that interface that was so great.
When Steam put Big Picture mode in beta, I knew I was done with consoles. I got a cube-shaped PC case that was big enough for a full-size video card, put said video card with a nice Ivy Bridge i5 CPU in it, and my consoles got the permanent shut-down.