I'm shocked.
I just installed Windows 10 on my wife's laptop and I like it. Not as much as I like Xubuntu (what I use on my laptop), but compared to 8.1 or Vista it's a huge step in the right direction. Multiple desktops, minimalist design, a start menu (again), and a slightly less crappy default browser (project Spartan) all make Windows 10 a much nicer OS than 8.
It remains to be seen whether it will beat out 7 for stability and ease-of-use, but so far I'm excited to have a reasonable gaming OS that doesn't suck at everything else.