I prefer win 8, not only for all the added features, but also because if you have Win 8 on multiple computers/laptop as I do. It synchronize everything between them based on your Win 8 account (from desktop settings, to browser history). And you can use the Skydrive to sync your files between computers as well.
I really don't want to start an OS fight, but I really prefer Windows 7 because it's not as much intrusive as Windows 8 is, and for file sync I use dropbox + chrome automatically syncs all settings/extensions/etc...
But, we should stop OS fights, that was just sarcastic.
It would be a real pointless OS fight, because its really a matter of preference. I've used every single versions of Windows at one time or another, I still have Win 7 on the desktop that I use on my living room TV. I just personally prefer using Win 8 so far and skydrive as more features then drop-box that I prefer. Also a large reason why I would not revert back to win 7 is because I've gotten used to the touchscreen bit.