I have been using Windows 8 Pro for about three weeks now, all of my games work OK, programming (masm32/fasm) is OK, no real problems yet.
The only time I spend in the 'metro' screen is when I login, click the only tile on the screen (Desktop) and don't leave it.
Except that winkey then typing takes you there, just like win7 except full screen, and it's a hell of a lot faster.
Bought a new SSD (Samsung 840 Pro), 128GB for $150, and it's quicker than my old setup (Intel 520 SSD, Win7).
Now I will see how quickly masm32 installs...
>windows 8 is a total piece of crap - lol
So how long have you been using it then?