Windows 8 is good even in its current state a lot of improvements have been made, but the whole windows brand is coming to an end.
I'm using Windows 7 since the winter of 2010 after using Windows XP for 6 years and I consider Windows 7 way better.
Windows 7 HP, far better than XP imo, in fact far better than any other OS Microsoft have released. Having said that Vista was fine and very similar to Win 7 providing you had a fairly decent spec machine.
Actually I truly love Windows 7, but it's annoying when getting notification of bug "taskhost windows" when shutting down the pc.
i used win 7, it's better than vista and equal with xp for performing, but better than xp for visual...
I used XP for years, skipped vista because of awful reviews and i am enjoying W 7 for some months now. I belive windows 7 is the best windows at present tense.