Every other edition...
From what I hear, Windows 9 is sounding like a nice release. It fixes what was wrong with Windows 8.
The tiled interface? It's not so bad. I have a Windows phone, and the interface has grown on me. At first I thought I'd miss the affordance given by "shaped" buttons in Windows 7 and earlier, but the truth is, those were never very consistently applied anyway. And sure the tiles have different looks/design styles, but how is that different from the icons on a start menu?
If the start menu is really back, and it gives you the option to do simple things like "run a command shell" or "shut down" without either remembering some arcane key combination, or waggling the mouse in a random screen location - I'm in. It's time I replaced my old XP machine anyway...