Every niche has it's ignorant fanboys.
They are all equally Fanatical.
You have the Hardcore Linux nuts that are anti everything Microsoft has ever done, yet they haven't seen XP on 2K as they compare their 2.4 or 2.6 kernal linux distros to 95 or 98 or older NT releases.
You have the Mac guys who are not aware of the smell of their own excrement.
You have the Bose crowd who think Bose makes the worlds finest speakers.
You have the AMD fanboys who think the X2s are better than the Conroes.
You have the MS fanboys who claim their IIS server is more stable and/or efficient than a *nix based server.
You have the Google fanboys who believe google does no harm and is the most innocent company in the world.
Every "cause" has a following.
Lots of the followers are sheep.
Me,
I'll stick to the "best bang for the buck" category in CPUs (usually AMD wins this one, but Intel has been really really attractive as of recent with the lowwer end Conroes)
I'll run Linux on my Server, PVR, and Laptop, and Windows on my Gaming Rig and workstation at work. I'll Stick with Firefox as my browser because it runs great on my Windows and Linux boxes. I like how it looks and runs better then Seamonkey, and I haven't tried Opera in 3 or 4 years, but last time I did try, I was less than impressed.
Personally, I'm a BitchX fanboy. I hate mIRC even though I'm sure it's improved a lot since 1998 when I last tried it. (If I can't have BitchX then at least give me Epic!)