Windows 8 is actually quite good. It's stable and more responsive/smooth than Windows 7. I've had zero compatibility issues.
My only complaint is that more games/apps are metro-enabled so I can stop going to the traditional desktop.
Win8 is a different interface than previous versions of Windows. If you don't embrace that when you start using it then you're just going to end up spewing complaints all over the internet. However, if you actually give it a chance then you might actually like it.