I can't say "go back" as i'm mainly a windows user. To be fair, I would never have even purchased an Apple computer if i hadn't been given a gift card for the majority of the purchase of the Air i do own.
While I love the hardware, and think apple really hit one out of the park, OSx lion seems to be hit or miss. Some things are excellent. I love desktops, I love gestures, I love how smooth and flawlessly you can navigate. However, the WiFi management and connectivity issues i'm having with Lion make me want to freak out
But Windows 7 does things OSx can't either. I've always wanted the "dock", but after finally using one extensively. Win7 Taskbar, mouse over previews and ability to open / close via their quick menues and previews is just faster and more productive.
The start menu is far more intuitive than going into applications folder, and launchpad is too big and clunky. it works for touch devices like ipod and ipads, But it's more of a fancy looking feature than anythign else, Especially once you start really adding up the applications.
I also find that several OSx varieties of games I like to play, run smoother under windows. I've downloaded for example World of Warcraft for both windows and OSx. Both running off an external hard drive. While in Windows, i can run the game at higher resolution with higher textures and better graphics settings than OSx. OSx version on aything but minimum is unplayable. Same goes for Counterstrike Source and i'm terrified to start SWTOR on the AIR.
Will i "go back" to windows? yes. Win7 is still my primary OS and will continue to be.
However, When WIN8 drops..... OSx just might take over.