If you're familiar with television, the Internet and computers, no doubt you are familiar with the Mac vs PC commercials. They're humorous and they poke fun at some of the stereotypes of Windows/PCs.
In spam filtering, I've said it before and I'll say it again: I'm actually pretty neutral with regards to the platform used to fight spam. As a user, I use both Windows and Linux on a daily basis in my spam fighting. I use Windows to analyze data and make presentations, not to mention writing reports. The back-end work (especially Microsoft Office) is in the critical path of my daily work flow. I do a whole pile of research using Linux because many of the native Linux commands, like dig and awk, are incredibly convenient to use and they don't have Windows equivalents. I use Linux to acquire data. I use Windows to analyze and organize it.
The one advantage that Windows has, I think, is that various software bits like SQL Server, Exchange and IIS can be leveraged to integrate more smoothly because they are developed by the same company.
As a personal user, I use both platforms, but I also use the Mac to do video editing and some web surfing once in a while. So you see, different platforms can be used to accomplish different things. It all depends on what you use it for.
I get off my soapbox to embed this funny video I found on Youtube, it's a Mac vs PC vs Linux parody and I thought I'd post it here. It makes fun of all the platforms.