I've been using Linux since 1994. I'm no dedicated Linux lover, I love all sorts of UNIX. Sun Solaris, SGI IRIX, OpenBSD, you name it. When Apple introduced MacOSX I was completely sold. Switched two years ago, haven't looked back.
Windows is OK too, I use it at work every day, but I wouldn't use it at home, it's way too.. uh.. "not me".