All OSX in my household. When I bought my wife an intel iMac I wanted to install XP just because I could, but she wouldn't let me. She didn't want me messing with her computer. When I finally upgraded from a powerbook G4 a couple of months ago to an Air, I considered using bootcamp of Fusion, but couldn't think of a single reason to install XP. I'm not a "gamer," nor do I need it for my work, and so I am all OSX.