Switched to using Mac OSX in April 2005. I wanted to try out OSX after using Windows for almost ten years. The first purchase was a Mac Mini and thought it was worth investing the
60000 yen yen to try it out. I fell in love with the system and immediately ordered a PowerBook. The Mac Mini is now attached to the plasma for browsing and watching opensource videos.
Took me a while but I eventually got my wife to switch to Mac too ^^. Maintaining Windows was such a pain. I spent too much of my time maintaining rather than computing. Maintaining OSX is such a breeze and making a copy of the system is too easy. You can even back up your system to a different partition on your iPod and boot from it. You can even make encrypted copies of your system or data and hide the hard disk around your friends house when they are not looking (always best to keep an off-site copy of your data).