It's already been said, but the word itself really has a negative connotation. It's more than the sum of its parts, or its strict definition, but that's mostly because it's jargon in the first place. You might as well argue why being a bastard isn't always a bad thing, since it only means you were born through parents out of wedlock, or why being a female dog can be endearing in the right context. I'm fairly sure most people who use the terms aren't considering the actual definitions of the words.

Liking, following, and supporting something is fine.

Borderline worshiping something and working as an unpaid spin doctor for it is not. Youtube is filled with these dishonest wierdos, both those who hide it and those who flaunt it, and all of them have followers who seem to just eat up their lies, excuses, "reviews," and predictions.

Because like some hardcore games they seem to say some delusional stuff. People do not want to hear nonsense.

I think one big problem with with fanboys is that they do themselves a disservice. By being blindly devoted to a single company or brand, they miss out on so many great games. I'm not talking about kids who are 13 and 14. I'm talking about 20 something year olds who can easily afford more than one console and would have no issues buying more than one if they all had the same brand name.

Being a fan is OK. Being a fanboy is not, because you become blind to things you don't want to see and you start seeing things that aren't there. In English, everything a company does seems better than it is and conversely, everything the others do seems worse than it is.

There's a difference between passionate fan and fanboy. 'Fanboys' are biased in everything they say and do, to the point of delusion. Hard to distinguish between them and trolls sometimes, that's how bad it gets. Thankfully on here the severe ones get banned, or at least called out by others.

This.   

A fanboy don't respect any other opinions it's a blind person who care more about an product or celebrity then himself

Yeah the entire gaming media are cult followers of the Kojiminati lol what a coincedence

I personally don't like the word fanboy. I like the word preference. just me though.