They all have their own uniquely annoying idiosyncrasies.
Offhand, Apple elitists are among the worst (coming from a Mac user since the 80s who's owned 7 Macs, 4 iPods and an iPhone), particularly the ones who "discovered" Apple in the post-iPod market and inexplicably buy (or want) just about everything Apple designs. BTW: the Mac is still terrible as a gaming platform. And if you're running Windows in dual boot for the purpose of gaming through Windows, why Dear God, oh why. Does using a PC box give you a non-Apple brand rash?
Sega fanboys seems to be eternally embittered since Sega's own poor business decisions and practices allowed them to be steamrolled out of the console market.
Sony fanboys have only recently begun to accept a world in which the Playstation brand is no longer the first word in gaming. Quite a few are still in a state of deep denial.
Nintendo fanboys developed the ridiculous tendency this generation to defend literally everything the company releases as being pure gold while conveniently overlooking the products that weren't, always falling back on the "Nintendo Prints Money!" clause as proof they can do no wrong.
PC fanboys (coming from a PC builder/overclocker)... Oh my. People could probably write a hilariously spot on book about these guys. I won't even venture to start here. Newsflash: the vast majority of individuals don't want to build their own computer from a box of parts ordered from NewEgg in the interest of saving a few fistfuls of cash and give them the most FPS per Dollar. You will always be a small niche market of the overall PC userbase.
Xbox fanboys: if you were really hardcore, you would have already built your own custom gaming PC and realized that the only advantage the 360 has to offer is its own encapsulated userbase otherwise known as XBL.
"But... how will I play Halo?" Fine. You get a pass; enjoy your Xbox. Crackhead.
