I'm a regular Windows user (at work and at home) but I use also OS like Linux (I've done my Engineering Thesys on Linux some years ago). I'm a Linux estimator (for me it's a very interesting OS), but I hate the Linux fans that says that "Linux is better than Windows", "Linux is more secure than Windows" or "Linux is more innovative than Windows"... however, I could understand the fans of an OS (is something like the fans of a footbal team 
).
What hurts me is something like the fact that I've just read on ZDNet.
Matt Asay, Novell's director of Linux Business Office, said at the Linux User and Developer Expo 2004 in London that Linux threatened the proprietory software industry with innovation, rather than extinction, and accused companies such as Microsoft of failing to come up with exciting new applications.
Exclamation like "When was the last time that Microsoft Office got significantly better? It's been pretty much the same product for a while now" or "As things stand, creativity has gone, and that's one reason that Linux on the desktop makes sense. It'll be good for Microsoft, too. They won't like it, but it will force them to innovate" seems a little bit arrogant... 