Ok so when my windows friends use Macs, they love them. In the past 6 months I have pursuaded 7 of my friends to buy Macs, along with my Mum, Brother and workmate. The most common complaints that come up though, are MSN (hotmail is used by absolutely everybody here my age, most people don't even reliase that you can IM through other things like AOL or Skype), and also one of those small things that I actually agree with is the ability to switch between windows within apps. Alt tab in windows allows you to switch between all windows whereas command tab in Mac only takes you through apps. But ha! I found this by accident when trying to scroll through tabs in Safari. Press Command+That squiggly line key to the right of the shift key. Ta da! Switching through windows!