In my book, a fanboy is someone who puts up with (or disregards) excruciatingly painful downsides to something while praising it blindly. I do consider there to be die-hard fans that I don't call fanboys, though they are excluded because they admit the faults of their choice and prefer it based on circumstance; these people usually acknowledge that there is no "best," but merely a "best for the situation." Apple has the worst fanboys because Apple has proven time and time again that they don't care about their consumers with awful licensing practices, restrictive systems and active prevention of free consumer choice; this doesn't make all Apple products bad, but it means many apple "fans" are just Sheeple that don't read the books they preach. Businesses and maybe even the world need Fanboys to help mitigate the occurrence of those opposite of a fanboy which immediately disown something just because they ran into something they don't understand. The Fanboy is most qualified to show somebody all the pros to something while avoiding the cons ;p. Some would probably call me a fanboy, though I propose that I do acknowledge the fallbacks of even thos things which I use frequently and I typically will not use something unless I think it's the right thing to get the job done to the best of my ability. I secretly hate Linux fanboys; Linux is great for certain things, but the Linux fanboys think they're running the *perfect* OS without acknowledging some really really painful setup, packaging, configuration and usability scenarios. It's the only OS where I still experience dependency-hell on a regular basis. Though my favorite fanboys are the Linux ones that try to point you to tools best for you, not just the ones they use; these fanboys are probably the most educated I've encountered.