Not addressing flaws a product has, or even not believing it has flaws at all doesn't make a person a fanboy, since these are simple matters of preference. It's when you don't accept these preferemces as subjective taste and feel the need to argue the product's alleged superiority with other people that you're a fanboy. IMO, anyway.
I think most of the people here understand they're part of a niche and are buying something that just happens to meet their particular tastes. Unfortunately, a lot of people come off as overly defensive, and don't take criticism very well, quick to snap back with "you just don't get the point", "stick with your precious PSP then", or even "get out."