I went from win7 to win8 about 1½ years ago. I then got 3 problems, that today is unsolved, but maybe MS is too much in the game to make win8 a salesuccess?
My 3 problems are:
Driver for my buildin USB3 HUB, so it actually runs USB3 speed? (works in win7 with win7 standard usb3driver)
Games build on dx9.0c or older runs like crap in windows 8
Problem with my G25 and cstm profiles (works in win7)
Beside from the above I like windows 8.1 (well it is quite ugly, but I got 3th party aero, so now it is looking allmost like win7). It is using lesser space on my SSD, it seems to run more clean, but it still needs to be nursed or it will also get "dusty". As my PC is a "homebuild" and I have installed my Windows 8.1 from an USBkey, I don't have a "recovery"partition, and the "refresh windows 8.1" has never worked for me. Don't know why. So now I am at a crossroad, should I stay with windows 8.1 (along with the new update, that will come later today), or should I return to win7?
Metro and fullscreen apps is not my cup of tea, never used it, and I don't think I will in the future.
What I'm trying to say is, that both windows 7 AND windows 8.1 has good sides and bad sides like allmost anything else in this world.