I just bought a MBP over the weekend. I've only used Windows before. It's driving me insane, like trying to learn to do everything with my non-dominant hand. I think I'm going to return it.
did the apple store show you around?
i came from windows, and in my opinion....Mac is easier to learn than Windows, its way more simple to understand, too bad you don't wanna stick around to find out...besides you have a few days before you decide to return anyways.
and a Mac is better for iOS, plus iCloud, FaceTime, iCal, Mail, Mac app store, quicktime, iPhoto, hopefully iMessage, find your Mac, Many apps, etc etc....i would never give all of this up to go back to windows, NEVER...but i might install windows 8 on my Mac.
any questions, just ask...you might have to make your own thread, and hope i see it, or pm me that you did, also many others on here willing to help.